{"id":"6de570cb-1f1a-4d00-b6d6-b01151275651","shortId":"NpyjJa","kind":"mpp","title":"Resolve U.S","tagline":"Resolve U.S. CFR citations to current regulatory text with provenance, semantic search, and change tracking via MPP pay-per-request.","description":"GovLaws provides a structured API for AI agents to look up current U.S. federal regulations (Code of Federal Regulations) by citation, perform semantic search over regulatory text, and track recent changes from the Federal Register. The /api/mpp/resolve endpoint accepts a CFR citation string (e.g. \"12 CFR 1026.43\") and returns the current regulatory text, source metadata, freshness timestamps, and a detailed provenance object indicating whether the data comes from eCFR (unofficial but current) or GovInfo (official edition). Payment is handled via the Machine Payments Protocol (MPP) using Tempo stablecoin settlement — no API key or account is required.\n\nThe service ingests data from eCFR and the Federal Register on a 4-hour cycle. Every response includes provenance fields with trust signals (disclaimer_code, citation_suitability) so agents can programmatically decide whether the data is suitable for research, reference, or legal filings. The resolve endpoint costs $0.05 per request via MPP (amount 50000 in pathUSD base units with 6 decimals). Companion MPP endpoints exist for semantic search ($0.03/req) and change detection ($0.03/req).\n\nThe OpenAPI spec is comprehensive, covering input schemas, response examples, error codes, and payment metadata. The service also offers an account-based lane with tiered plans (Free at 10 req/mo, Developer at $49/mo for 5,000 req, Pro at $499/mo for 100,000 req) for agents that prefer recurring API-key access with budget controls and webhook subscriptions.","tags":["legal","regulatory","government","citations","compliance","federal"],"capabilities":["cfr-citation-resolve","semantic-regulation-search","federal-register-change-detection","provenance-metadata","freshness-tracking","mpp-pay-per-request","tempo-stablecoin-settlement","batch-citation-resolve","webhook-change-notifications","budget-controls","api-key-management"],"categories":["legal","government","search"],"synonyms":["CFR lookup","federal regulation API","Code of Federal Regulations","eCFR search","regulatory change tracking","legal data API","US regulation lookup","government law API","federal register changes"],"warnings":["Probe did not receive a 402 challenge from /api/mpp/resolve — got 400 instead, likely due to missing required 'citation' parameter during probing. Endpoint is probably live but not confirmed via standard MPP handshake.","eCFR-derived data is explicitly not an official legal edition — unsuitable for legal filings without independent verification.","Coverage appears limited to select CFR titles (12, 17, 26, 29, 42, 45 per the collections example), not all 50 titles."],"endpointUrl":"https://govlaws.ai/api/mpp/resolve","protocol":"mpp","transport":"http","auth":{"type":"mpp","details":{"realm":"govlaws.ai","intent":"charge","method":"tempo","service_methods":{"tempo":{"assets":["0x20c000000000000000000000b9537d11c60e8b50"],"intents":["charge"]}}}},"qualityScore":"0.720","qualityRationale":"Comprehensive OpenAPI spec with full schemas, examples, and payment metadata. The probe returned 400 (not 402) on HEAD and GET attempts to the MPP resolve endpoint, likely because the required 'citation' query parameter was missing. The endpoint is probably live but liveness could not be fully confirmed. Documentation and pricing are clear and 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