MPPtempoquality 0.78

Semantic search, citation lookup, and change tracking across current U.S

Semantic search, citation lookup, and change tracking across current U.S. federal regulations via API.

Price
$0.03 / call
Protocol
mpp
Verified
no
Endpoint
https://govlaws.ai/api/mpp/search

What it does

GovLaws provides a REST API for querying current U.S. federal regulations (Code of Federal Regulations). It offers three core capabilities: citation resolution (look up any CFR section and get its current text), semantic search (natural-language queries ranked by relevance with snippets and scores), and change detection (recent Federal Register amendments, final rules, proposed rules, and corrections filterable by agency, citation prefix, or lookback window up to 90 days). All responses include structured provenance metadata linking back to official .gov sources (eCFR, GovInfo, Federal Register), with machine-readable trust signals indicating whether the data is from an official legal edition and what citation contexts it is suitable for.

The `/api/mpp/search` endpoint listed here is the MPP (Machine Payments Protocol) lane for semantic search. It requires no API key or account — an unauthenticated call returns a 402 Payment Required challenge settled via Tempo stablecoin on Arbitrum. The price is $0.03 per search request. The request body takes a `query` string and an optional `limit` (1–20, default 5). Results include citation, title, relevance score, snippet, and eCFR URL. A separate account lane with API keys is available for recurring access at subscription tiers from free (10 req/mo) through Enterprise.

Data is ingested from eCFR and the Federal Register on a 4-hour cycle. Coverage spans multiple CFR titles (12, 17, 26, 29, 42, 45 per the collections endpoint). The OpenAPI spec is comprehensive, with full schemas for provenance objects, change events, input types, and error responses. Companion MPP endpoints exist for citation resolution ($0.05/req) and change feeds ($0.03/req), plus identity verification and refund flows.

Capabilities

semantic-searchcfr-citation-lookupregulatory-change-detectionprovenance-metadatanatural-language-queryfederal-register-trackingmpp-pay-per-requesttempo-stablecoin-settlementwebhook-subscriptionsbatch-citation-resolvebudget-controls

Use cases

  • —AI agent autonomously looking up the current text of a specific CFR section during a compliance workflow
  • —Legal research copilot performing natural-language searches across federal regulations and returning ranked citations
  • —Compliance monitoring system subscribing to regulatory change feeds for specific agencies or CFR titles
  • —Fintech product checking mortgage underwriting rules (e.g., 12 CFR 1026.43) with provenance for audit trails
  • —Autonomous agent paying per-request via MPP without needing pre-provisioned API keys

Fit

Best for

  • —AI agents needing structured, machine-readable U.S. federal regulation data
  • —Compliance automation workflows requiring provenance and citation traceability
  • —Autonomous agents that prefer pay-per-request without account signup
  • —Applications that need near-real-time regulatory change detection

Not for

  • —State or local law lookups (federal CFR only, limited title coverage)
  • —Full-text legal research requiring official legal edition status for court filings (eCFR data is unofficial)
  • —High-volume bulk downloads of entire CFR titles (batch resolve capped at 50 citations)

Quick start

# Semantic search via MPP (no API key needed)
# First call returns 402 with Tempo payment challenge
curl -X POST https://govlaws.ai/api/mpp/search \
  -H 'Content-Type: application/json' \
  -d '{"query": "CFPB mortgage underwriting requirements", "limit": 5}'

Example

Request

{
  "limit": 5,
  "query": "CFPB mortgage underwriting requirements"
}

Response

{
  "query": "CFPB mortgage underwriting requirements",
  "total": 1,
  "results": [
    {
      "url": "https://www.ecfr.gov/current/title-12/section-1026.43",
      "score": 0.94,
      "title": "Minimum standards for transactions secured by a dwelling",
      "snippet": "(a) Scope. This section applies to...",
      "citation": "12 CFR 1026.43"
    }
  ],
  "provenance": {
    "trust": {
      "disclaimer_code": "ECFR_UNOFFICIAL",
      "citation_suitability": [
        "research",
        "reference"
      ]
    },
    "currency": {
      "as_of": "2026-03-11T08:00:00Z",
      "effective_date": null,
      "reflects_current_text": true
    },
    "source_system": "ecfr",
    "is_official_edition": false
  }
}

Endpoint

URLhttps://govlaws.ai/api/mpp/search
Transporthttp
Protocolmpp
CurrencypathUSD

Quality

0.78/ 1.00

Comprehensive OpenAPI spec with full schemas, examples, provenance model, and clear pricing. The MPP probe returned 405 because the endpoint is POST-only and was probed with HEAD/GET, so liveness is not confirmed via 402 challenge but is strongly implied by the complete spec and live landing page. Docs page returns 404, so external documentation beyond the OpenAPI spec and homepage is thin.

Warnings

  • —Probe returned 405 on HEAD and GET — endpoint is POST-only; no 402 challenge was captured directly, but the OpenAPI spec documents the MPP flow
  • —The /docs page returns 404; documentation is limited to the OpenAPI spec and homepage
  • —eCFR-derived data is not an official legal edition — unsuitable for court filings per the API's own trust metadata
  • —CFR title coverage is limited to titles 12, 17, 26, 29, 42, 45 per the collections endpoint example

Citations

Provenance

Indexed frommpp_dev
Enriched2026-04-19 15:54:20Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/WU4nBt
Semantic search, citation lookup, and change tracking across current U.S — Clawmart · Clawmart