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Reference

API reference

Every payload below is computed by the real determination engine against the live OMB and agency ruleset, not hand-typed JSON. Machine-readable spec at /api/openapi.

Base URL

https://sourceory.com/api/v1

Auth

Every endpoint (determine, thresholds, waivers, pricing) is free at the anonymous rate and needs no key to try. Send `Authorization: Bearer src_live_...` (or `x-api-key`) to lift the throttle to your plan's quota. A `src_test_...` key runs the real engine, is throttled, and never bills. No endpoint is paywalled: the recurring paid features (saved history, cross-agency compare, the audit-ready record export) live in the web app and are gated there.

Format

JSON. Success is `{ data, request_id, disclaimer }` plus an `attribution` string on free and anonymous responses; errors are `{ error: { code, message, details? }, request_id }`. Every response carries X-RateLimit-Limit, X-RateLimit-Remaining and X-RateLimit-Reset. A metered caller (a live key on a paid plan) also gets X-Quota-Limit, X-Quota-Used and X-Quota-Remaining for the monthly allowance. All of these are listed in Access-Control-Expose-Headers, so a browser-based agent can read them.

Determinism

Every response is a projection of a cited OMB or agency BABA dataset plus deterministic arithmetic. There is no model in the request path, so the same query always returns the same answer. Every threshold and waiver carries a `confidence` of "verified" or "verify" (render "verify" as Unverified, never as fact) and the source URL behind it. Where the loaded ruleset holds no agency or standard for an input, the response says insufficient_data rather than reporting a pass: absence of guidance is never treated as compliance.

Honesty semantics

A line verdict of insufficient_data means NOT DETERMINED, not compliant, and waiver_eligible means a waiver must still be applied for and granted. Our cross-agency ruleset is a curated subset of the covered BABA programs; treat either verdict as an instruction to confirm against the funding agency, never as a clean result.

Success envelope

Every success is { data, request_id, disclaimer }. This response is a real determination on a mixed bill of materials, computed from curl -X POST https://sourceory.com/api/v1/determine \.

200 response

{
  "data": {
    "input": {
      "agencySlug": "fhwa",
      "lines": [
        {
          "component": "steel girder",
          "category": "iron_steel",
          "cost": 120000,
          "allManufacturingInUS": true
        },
        {
          "component": "control panel",
          "category": "manufactured_product",
          "cost": 40000,
          "manufacturedInUS": true,
          "domesticComponentCost": 18000
        }
      ]
    },
    "agency": {
      "slug": "fhwa",
      "name": "FHWA",
      "program": "Federal-aid highway program"
    },
    "findings": [
      {
        "lineIndex": 0,
        "component": "steel girder",
        "category": "iron_steel",
        "verdict": "compliant",
        "domesticContentPct": null,
        "thresholdPct": null,
        "summary": "Iron & steel: all manufacturing in the US. Compliant.",
        "rule": "All iron and steel used in the project must be produced in the United States, meaning all manufacturing processes from the initial melting stage through the application of coatings occurred in the United States.",
        "remedy": "",
        "citation": {
          "source": "OMB M-24-02 government-wide baseline, applied by FHWA",
          "url": "https://www.whitehouse.gov/wp-content/uploads/2023/10/M-24-02-Buy-America-Implementation-Guidance-Update.pdf",
          "retrievedAt": "2026-07-21",
          "confidence": "verified"
        }
      },
      {
        "lineIndex": 1,
        "component": "control panel",
        "category": "manufactured_product",
        "verdict": "compliant",
        "domesticContentPct": null,
        "thresholdPct": null,
        "summary": "Manufactured product assembled in the US. Compliant: no component-cost test applies at this obligation date.",
        "rule": "A manufactured product permanently incorporated into the project must be manufactured in the United States (the final assembly requirement). The 55 percent domestic component-cost test does not apply to projects obligated before October 1, 2026.",
        "remedy": "",
        "citation": {
          "source": "FHWA Q&As on the Buy America Final Rule for Manufactured Products (89 FR, final rule published January 14, 2025)",
          "url": "https://www.fhwa.dot.gov/construction/contracts/pdfs/Manuf_Products_QA_FINAL_RULE_Doc1.pdf",
          "retrievedAt": "2026-08-02",
          "confidence": "verified"
        }
      }
    ],
    "summary": {
      "totalLines": 2,
      "compliant": 2,
      "nonCompliant": 0,
      "waiverEligible": 0,
      "insufficientData": 0,
      "totalCost": 160000,
      "projectDomesticContentPct": 100,
      "compliantOverall": true
    },
    "deMinimis": {
      "applies": false,
      "nonCompliantCost": 0,
      "excludedCost": 0,
      "applicableCost": 160000,
      "capUsd": 8000,
      "pctOfApplicableCost": 5,
      "maxUsd": 1000000,
      "note": "No non-compliant material, so the de minimis test does not arise. The cap would be $8,000.",
      "citation": {
        "source": "FHWA Buy America Construction Program Guide",
        "url": "https://www.fhwa.dot.gov/construction/cqit/buyam.cfm",
        "retrievedAt": "2026-08-02",
        "confidence": "verified"
      }
    },
    "standardsAsOf": {
      "date": "2026-08-02",
      "suppliedByCaller": false,
      "upcomingChange": {
        "category": "manufactured_product",
        "from": "2026-10-01",
        "statement": "A manufactured product must meet the final assembly requirement AND the cost of its components that are mined, produced, or manufactured in the United States must be greater than 55 percent of the total cost of all components."
      }
    },
    "coverage": {
      "agenciesLoaded": 4,
      "waiverCategoriesLoaded": 5,
      "note": "Determinations run against 4 funding agencies and 5 waiver categories currently loaded. BABA covers more than 60 federal financial-assistance programs; where an agency is not loaded, request it rather than assuming its standard matches another agency's."
    }
  },
  "request_id": "req_2f9c41a7b0e84d15",
  "disclaimer": "Sourceory provides Build America, Buy America compliance guidance based on published OMB and agency sources. It is not legal advice and not an official agency determination or waiver. BABA guidance and waivers are updated over time and are fact-specific. Always confirm against the funding agency's current guidance and your grant terms before certifying compliance or applying for a waiver."
}

The citation shape

How to read a source and confidence

Every threshold and waiver carries the citation it came from, in this shape. There is no "reported" middle tier: a value is either verified against the cited page or it is not, and an unverified value must render as Unverified, never as fact.

keytypemeaning
sourcestringHuman label for the source, e.g. "OMB M-24-02".
urlstringThe official page the value was read from.
retrievedAtstring (optional)ISO date the value was retrieved.
confidence"verified" | "verify""verified" was read directly off the cited page. "verify" renders as Unverified in every client; never presented as fact.

Errors

Structured, never silent

Every non-2xx response is JSON in the { error: { code, message }, request_id } envelope. The code is stable; build on it, not on the message text.

codestatusmeaning
invalid_request400A required parameter is missing or malformed, such as an empty lines array or an unknown material category. The message names the parameter.
unauthorized401The Authorization header carries a key that is not valid or has been revoked. Only sent when you supply a key; keyless calls are allowed at the anonymous rate.
not_found404No funding agency or waiver category matches the slug supplied. The message lists the loaded slugs, never a fabricated threshold.
rate_limited429You exceeded the anonymous rate, the test-key throttle, your plan's per-minute burst, or your plan's monthly allowance.
internal500An unexpected server error. Safe to retry; contact support if it persists.

404, unknown agency

{
  "error": {
    "code": "not_found",
    "message": "No funding agency matches \"dot-faa\". Loaded agencies: omb, fhwa, epa-srf, usda-rd."
  },
  "request_id": "req_2f9c41a7b0e84d15"
}

Rate limits & quota

By key type

Every endpoint works with no key at the anonymous rate. Send a key to lift the throttle to your plan's quota. A free test key runs the real engine and never bills; a live key needs Pro or Scale.

TierBurstVolume
Anonymous (no key)4/min20/day per IP. Enough to run a call out of these docs, not enough to build on.
Test key (free on every plan)10/min200/day against the real engine and ruleset. Never bills.
Pro (live key)60/min1,000 calls/mo. A hard ceiling, not a meter: past it the API returns rate_limited rather than billing you.
Scale (live key)300/min10,000 calls/mo. A hard ceiling, not a meter: past it the API returns rate_limited rather than billing you.

Every response carries X-RateLimit-Limit, X-RateLimit-Remaining and X-RateLimit-Reset, so an agent can back off before a 429. Full plans at /pricing or the machine-readable /api/v1/pricing.

Endpoints

Every route

GET

/api/v1

Key optional

A self-describing index of the whole API surface: every endpoint with its summary and auth requirement, plus links to the OpenAPI document, the MCP server, the docs and machine-readable pricing. Start here if you are discovering this API programmatically. Free, keyless and not rate-limited.

request

curl https://sourceory.com/api/v1
POST

/api/v1/determine

Key optional

Run a Build America, Buy America (BABA) domestic-content determination on a project bill of materials for a funding agency. Deterministic: no model, so identical input always returns an identical verdict. Each line returns one of four verdicts: compliant, non_compliant (fails the standard on the facts supplied), waiver_eligible (fails the standard AND the project-level de minimis test was computed and passed, so a de minimis waiver may cover it; it must still be applied for and granted and is NOT a pass), or insufficient_data (facts supplied cannot reach a verdict, also NOT a pass). A non_compliant line may carry waiverRoutes: qualitative waiver categories whose tests turn on facts this API does not hold, offered as leads to investigate and never as findings. Iron & steel and construction materials use an all-manufacturing-in-US test; manufactured products use the US component-cost test, which is STRICTLY GREATER THAN the threshold, so a product at exactly 55.0% fails. summary.compliantOverall is true only when every line is compliant. Send asOfDate: standards phase in by project obligation date, and the date used is reported back in standardsAsOf. An agency slug we do not hold yields agency:null and insufficient_data lines rather than a guess. Supports an `Idempotency-Key` header for keyed callers: replaying the same key with the same body returns the original result rather than a second billable call, and reusing a key with a different body returns 422 rather than another project's verdict.

ParamInRequiredDescription
agencySlugbodyyesFunding agency slug: omb, fhwa, epa-srf, or usda-rd.
linesbodyyesNon-empty array of { component, category, cost, ... }. The maximum is your plan's batch allowance, published as bom_lines_per_run at /api/v1/pricing. category is iron_steel | manufactured_product | construction_material. Manufactured products also take manufacturedInUS and domesticComponentCost (which must not exceed cost); iron/steel and materials take allManufacturingInUS.
asOfDatebodynoThe date the project's federal funds were obligated, yyyy-mm-dd. Decides which phase of a phased standard governs: FHWA applies final assembly only to projects obligated from 2025-10-01 and adds the 55% component-cost test from 2026-10-01. Strongly recommended.

request

curl -X POST https://sourceory.com/api/v1/determine \
  -H "Content-Type: application/json" \
  -d '{"agencySlug":"fhwa","asOfDate":"2026-08-03","lines":[{"component":"steel girder","category":"iron_steel","cost":120000,"allManufacturingInUS":true},{"component":"control panel","category":"manufactured_product","cost":40000,"manufacturedInUS":true,"domesticComponentCost":18000}]}'

response 200

{
  "data": {
    "input": {
      "agencySlug": "fhwa",
      "lines": [
        {
          "component": "steel girder",
          "category": "iron_steel",
          "cost": 120000,
          "allManufacturingInUS": true
        },
        {
          "component": "control panel",
          "category": "manufactured_product",
          "cost": 40000,
          "manufacturedInUS": true,
          "domesticComponentCost": 18000
        }
      ]
    },
    "agency": {
      "slug": "fhwa",
      "name": "FHWA",
      "program": "Federal-aid highway program"
    },
    "findings": [
      {
        "lineIndex": 0,
        "component": "steel girder",
        "category": "iron_steel",
        "verdict": "compliant",
        "domesticContentPct": null,
        "thresholdPct": null,
        "summary": "Iron & steel: all manufacturing in the US. Compliant.",
        "rule": "All iron and steel used in the project must be produced in the United States, meaning all manufacturing processes from the initial melting stage through the application of coatings occurred in the United States.",
        "remedy": "",
        "citation": {
          "source": "OMB M-24-02 government-wide baseline, applied by FHWA",
          "url": "https://www.whitehouse.gov/wp-content/uploads/2023/10/M-24-02-Buy-America-Implementation-Guidance-Update.pdf",
          "retrievedAt": "2026-07-21",
          "confidence": "verified"
        }
      },
      {
        "lineIndex": 1,
        "component": "control panel",
        "category": "manufactured_product",
        "verdict": "compliant",
        "domesticContentPct": null,
        "thresholdPct": null,
        "summary": "Manufactured product assembled in the US. Compliant: no component-cost test applies at this obligation date.",
        "rule": "A manufactured product permanently incorporated into the project must be manufactured in the United States (the final assembly requirement). The 55 percent domestic component-cost test does not apply to projects obligated before October 1, 2026.",
        "remedy": "",
        "citation": {
          "source": "FHWA Q&As on the Buy America Final Rule for Manufactured Products (89 FR, final rule published January 14, 2025)",
          "url": "https://www.fhwa.dot.gov/construction/contracts/pdfs/Manuf_Products_QA_FINAL_RULE_Doc1.pdf",
          "retrievedAt": "2026-08-02",
          "confidence": "verified"
        }
      }
    ],
    "summary": {
      "totalLines": 2,
      "compliant": 2,
      "nonCompliant": 0,
      "waiverEligible": 0,
      "insufficientData": 0,
      "totalCost": 160000,
      "projectDomesticContentPct": 100,
      "compliantOverall": true
    },
    "deMinimis": {
      "applies": false,
      "nonCompliantCost": 0,
      "excludedCost": 0,
      "applicableCost": 160000,
      "capUsd": 8000,
      "pctOfApplicableCost": 5,
      "maxUsd": 1000000,
      "note": "No non-compliant material, so the de minimis test does not arise. The cap would be $8,000.",
      "citation": {
        "source": "FHWA Buy America Construction Program Guide",
        "url": "https://www.fhwa.dot.gov/construction/cqit/buyam.cfm",
        "retrievedAt": "2026-08-02",
        "confidence": "verified"
      }
    },
    "standardsAsOf": {
      "date": "2026-08-02",
      "suppliedByCaller": false,
      "upcomingChange": {
        "category": "manufactured_product",
        "from": "2026-10-01",
        "statement": "A manufactured product must meet the final assembly requirement AND the cost of its components that are mined, produced, or manufactured in the United States must be greater than 55 percent of the total cost of all components."
      }
    },
    "coverage": {
      "agenciesLoaded": 4,
      "waiverCategoriesLoaded": 5,
      "note": "Determinations run against 4 funding agencies and 5 waiver categories currently loaded. BABA covers more than 60 federal financial-assistance programs; where an agency is not loaded, request it rather than assuming its standard matches another agency's."
    }
  },
  "request_id": "req_2f9c41a7b0e84d15",
  "disclaimer": "Sourceory provides Build America, Buy America compliance guidance based on published OMB and agency sources. It is not legal advice and not an official agency determination or waiver. BABA guidance and waivers are updated over time and are fact-specific. Always confirm against the funding agency's current guidance and your grant terms before certifying compliance or applying for a waiver."
}
GET

/api/v1/thresholds

Key optional

The BABA domestic-content standards. With no query, the full cross-agency matrix (every loaded agency by material category). With ?agency=<slug>, that agency's three standards with the threshold, effective date and the OMB or agency citation behind each. An unknown slug returns a not_found error listing the agencies we hold, never a fabricated threshold.

ParamInRequiredDescription
agencyquerynoOptional agency slug: omb, fhwa, epa-srf, usda-rd. Omit for the full matrix.

request

curl "https://sourceory.com/api/v1/thresholds?agency=fhwa"

response 200

{
  "data": {
    "agency": {
      "slug": "fhwa",
      "name": "FHWA",
      "program": "Federal-aid highway program"
    },
    "standards": [
      {
        "category": "iron_steel",
        "test": "all_us",
        "thresholdPct": null,
        "effectiveDate": "2022-05-14",
        "statement": "All iron and steel used in the project must be produced in the United States, meaning all manufacturing processes from the initial melting stage through the application of coatings occurred in the United States.",
        "citation": {
          "source": "OMB M-24-02 government-wide baseline, applied by FHWA",
          "url": "https://www.whitehouse.gov/wp-content/uploads/2023/10/M-24-02-Buy-America-Implementation-Guidance-Update.pdf",
          "retrievedAt": "2026-07-21",
          "confidence": "verified"
        }
      },
      {
        "category": "manufactured_product",
        "test": "assembly_us",
        "thresholdPct": null,
        "effectiveDate": "2025-10-01",
        "statement": "A manufactured product permanently incorporated into the project must be manufactured in the United States (the final assembly requirement). The 55 percent domestic component-cost test does not apply to projects obligated before October 1, 2026.",
        "citation": {
          "source": "FHWA Q&As on the Buy America Final Rule for Manufactured Products (89 FR, final rule published January 14, 2025)",
          "url": "https://www.fhwa.dot.gov/construction/contracts/pdfs/Manuf_Products_QA_FINAL_RULE_Doc1.pdf",
          "retrievedAt": "2026-08-02",
          "confidence": "verified"
        }
      },
      {
        "category": "construction_material",
        "test": "all_us",
        "thresholdPct": null,
        "effectiveDate": "2022-05-14",
        "statement": "All manufacturing processes for the construction material must have occurred in the United States, per the OMB-defined construction materials list.",
        "citation": {
          "source": "OMB M-24-02 government-wide baseline, applied by FHWA",
          "url": "https://www.whitehouse.gov/wp-content/uploads/2023/10/M-24-02-Buy-America-Implementation-Guidance-Update.pdf",
          "retrievedAt": "2026-07-21",
          "confidence": "verified"
        }
      }
    ]
  },
  "request_id": "req_2f9c41a7b0e84d15",
  "disclaimer": "Sourceory provides Build America, Buy America compliance guidance based on published OMB and agency sources. It is not legal advice and not an official agency determination or waiver. BABA guidance and waivers are updated over time and are fact-specific. Always confirm against the funding agency's current guidance and your grant terms before certifying compliance or applying for a waiver."
}
GET

/api/v1/waivers

Key optional

The BABA waiver categories. With no query, all five (public_interest, nonavailability, unreasonable_cost, de_minimis, small_grants), each with its objective test where one exists (de minimis 5% cap, unreasonable cost 25% differential) and its citation. With ?waiver=<slug>, that one category.

ParamInRequiredDescription
waiverquerynoOptional waiver slug. Omit for the full catalogue.

request

curl "https://sourceory.com/api/v1/waivers"

response 200

{
  "data": {
    "waivers": [
      {
        "slug": "public_interest",
        "name": "Public Interest Waiver",
        "quantitativeTest": null,
        "citation": {
          "source": "OMB M-24-02, Section 70914(b) of BABA and 2 CFR 184.7",
          "url": "https://www.whitehouse.gov/wp-content/uploads/2023/10/M-24-02-Buy-America-Implementation-Guidance-Update.pdf",
          "confidence": "verified"
        }
      },
      {
        "slug": "nonavailability",
        "name": "Nonavailability Waiver",
        "quantitativeTest": null,
        "citation": {
          "source": "OMB M-24-02, Section 70914(b) of BABA and 2 CFR 184.7",
          "url": "https://www.whitehouse.gov/wp-content/uploads/2023/10/M-24-02-Buy-America-Implementation-Guidance-Update.pdf",
          "confidence": "verified"
        }
      },
      {
        "slug": "unreasonable_cost",
        "name": "Unreasonable Cost Waiver",
        "quantitativeTest": "Domestic preference would increase overall project cost by more than 25 percent",
        "citation": {
          "source": "OMB M-24-02, Section 70914(b) of BABA and 2 CFR 184.7",
          "url": "https://www.whitehouse.gov/wp-content/uploads/2023/10/M-24-02-Buy-America-Implementation-Guidance-Update.pdf",
          "confidence": "verified"
        }
      },
      {
        "slug": "de_minimis",
        "name": "De Minimis Waiver",
        "quantitativeTest": "Cumulative cost of non-domestic components is 5% or less of total material cost",
        "citation": {
          "source": "OMB M-24-02, general applicability public interest waiver examples",
          "url": "https://www.whitehouse.gov/wp-content/uploads/2023/10/M-24-02-Buy-America-Implementation-Guidance-Update.pdf",
          "confidence": "verified"
        }
      },
      {
        "slug": "small_grants",
        "name": "Small Grants Waiver",
        "quantitativeTest": "Total Federal award does not exceed the Simplified Acquisition Threshold (currently $250,000)",
        "citation": {
          "source": "OMB M-24-02, general applicability public interest waiver examples",
          "url": "https://www.whitehouse.gov/wp-content/uploads/2023/10/M-24-02-Buy-America-Implementation-Guidance-Update.pdf",
          "confidence": "verified"
        }
      }
    ]
  },
  "request_id": "req_2f9c41a7b0e84d15",
  "disclaimer": "Sourceory provides Build America, Buy America compliance guidance based on published OMB and agency sources. It is not legal advice and not an official agency determination or waiver. BABA guidance and waivers are updated over time and are fact-specific. Always confirm against the funding agency's current guidance and your grant terms before certifying compliance or applying for a waiver."
}
GET

/api/v1/pricing

Key optional

Machine-readable pricing: every plan id, its monthly price (read live from lib/plans.ts, never hardcoded), what it includes, the included monthly API-call allowance (a hard ceiling, not a meter), rate limits, and whether it grants the determination-record export. Lets an agent self-select a plan without a human reading the pricing page. Free, keyless, not rate-limited.

request

curl https://sourceory.com/api/v1/pricing

response 200

{
  "data": {
    "unit": "billable API call",
    "currency": "USD",
    "anonymous": {
      "price_usd": 0,
      "rate_limit_per_minute": 4,
      "rate_limit_per_day": 20,
      "note": "Every endpoint is free and keyless to try at the anonymous rate. A test key is free on every plan and never bills."
    },
    "test_key": {
      "rate_limit_per_minute": 10,
      "rate_limit_per_day": 200
    },
    "plans": [
      {
        "id": "free",
        "name": "Free",
        "price_usd_per_month": 0,
        "saved_determinations": 0,
        "bom_lines_per_run": 25,
        "included_api_calls_per_month": 0,
        "rate_limit_per_minute": 0,
        "api_access": false,
        "record_export": false,
        "cross_agency_compare": false,
        "mcp_production": false,
        "features": [
          "Line-by-line BABA calculator, runs in your browser so BOM data is never transmitted",
          "Every agency and waiver reference page, with cited thresholds",
          "COMPLIANT / NON-COMPLIANT / WAIVER-ELIGIBLE verdicts with the OMB or agency citation",
          "Test API key for developers (throttled, never bills)",
          "Public API and MCP at the anonymous rate"
        ]
      },
      {
        "id": "pro",
        "name": "Pro",
        "price_usd_per_month": 49,
        "saved_determinations": "unlimited",
        "bom_lines_per_run": 500,
        "included_api_calls_per_month": 1000,
        "rate_limit_per_minute": 60,
        "api_access": true,
        "record_export": true,
        "cross_agency_compare": true,
        "mcp_production": true,
        "features": [
          "Saved determination history with the verdict and the agency standard it was checked against",
          "Audit-ready determination record export for your bid file, with the citations behind it",
          "Cross-agency compare: run one BOM against several funding agencies at once",
          "Compliance-gap analytics across your saved determinations",
          "Determination API and MCP server (1,000 calls/mo), up to 500 BOM lines per run",
          "Inspectable request log"
        ]
      },
      {
        "id": "scale",
        "name": "Scale",
        "price_usd_per_month": 149,
        "saved_determinations": "unlimited",
        "bom_lines_per_run": 5000,
        "included_api_calls_per_month": 10000,
        "rate_limit_per_minute": 300,
        "api_access": true,
        "record_export": true,
        "cross_agency_compare": true,
        "mcp_production": true,
        "features": [
          "Everything in Pro",
          "10,000 API calls/mo",
          "300 requests/minute burst",
          "Bills of materials up to 5,000 lines per run",
          "Priority support"
        ]
      }
    ]
  },
  "request_id": "req_2f9c41a7b0e84d15",
  "disclaimer": "Sourceory provides Build America, Buy America compliance guidance based on published OMB and agency sources. It is not legal advice and not an official agency determination or waiver. BABA guidance and waivers are updated over time and are fact-specific. Always confirm against the funding agency's current guidance and your grant terms before certifying compliance or applying for a waiver."
}

Sourceory provides Build America, Buy America compliance guidance based on published OMB and agency sources. It is not legal advice and not an official agency determination or waiver. BABA guidance and waivers are updated over time and are fact-specific. Always confirm against the funding agency's current guidance and your grant terms before certifying compliance or applying for a waiver.

Developer overviewMCP server

Start with no key, then raise the throttle

Every route answers anonymously at the free rate. A key lifts it to your plan's quota and gives you the inspectable request log.