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eCFR Full-Text Regulatory Search
x402
eCFR Full-Text Regulatory Search is a paid API for AI agents from project-api-gamma-sable.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-10).
Searches the Electronic Code of Federal Regulations (eCFR) by keyword, agency, or date range and returns matching regulatory content with links to the official UI.
Price / call$0.01
Success—
StatusUnknown
How this service works
Paid public-data feeds. Unpaid requests return HTTP 402. Prices are USDC on Base.
Output
Returns a slim JSON object containing an array of matching eCFR regulatory search results, each with relevant regulatory text excerpts and a UI link (uiLink) pointing to the corresponding section on ecfr.gov, along with pagination metadata.
Example use cases
Compliance research for environmental rules
“Search the eCFR for any regulations about 'stormwater discharge permits' from the EPA — give me up to 10 results with links so I can review the actual regulatory text.”
Tracking recent regulatory changes
“Find all eCFR entries last modified after January 1, 2024 that mention 'cryptocurrency' or 'digital assets' — I want to see what federal agencies have updated their rules recently on this topic.”
Legal due diligence on agency-specific rules
“Look up the eCFR for OSHA regulations containing the term 'lockout tagout' and return the first page of results so I can cite the relevant CFR sections in a safety compliance report.”
Technical details
Endpoint
GEThttps://project-api-gamma-sable.vercel.app/paid/ecfr/search?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to programmatically search the full text of the Electronic Code of Federal Regulations with filters by agency, date, and keyword — especially in agent workflows requiring up-to-date federal regulatory lookups with direct links to official source pages. Prefer this over static legal databases when freshness of eCFR data and pay-per-call pricing ($0.01 USDC) matter more than a subscription model.
Side effects
- HTTP 402 if payment (USDC on Base via x402 protocol) is not provided or fails
- Empty items array if no regulations match the query
- Malformed or missing query parameter causes 400 Bad Request
- Rate limiting or upstream eCFR API unavailability may cause 5xx errors
- Invalid date format in last_modified_after/before parameters returns error or empty results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"what": "eCFR full-text regulatory search (slim JSON + uiLink)",
"items": [],
"source": "/paid/ecfr/search"
}
}Tags
x402
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