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US Federal Agencies Directory
x402
US Federal Agencies Directory is a paid API for AI agents from us-regulations.use.x402atlas.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-28).
Returns Federal Register agency slugs, names, short names, and parent-child relationships, searchable by substring.
Price / call$0.005
Success—
StatusUnknown
How this service works
US federal agency directory — the Federal Register's agency slugs, names, short names and parent-child links, searchable by substring. Use to find the slug an agency filter needs, e.g. environmental-protection-agency for the EPA.
Output
Returns a JSON object with a list of matching agencies, each containing: slug (for use in regulation API filters), full name, short name (if any), parent agency slug (empty for top-level), and list of child agency slugs. Also includes retrieval timestamp, query echo, result count, source citation, and a normalization caveat.
Example use cases
Resolving agency slug for regulation search
“I want to search for OSHA rules in the Federal Register — can you look up the exact agency slug I need to use for the Occupational Safety and Health Administration?”
Exploring sub-agencies of a department
“What are all the child agencies listed under the Department of Transportation in the Federal Register? I need their slugs to monitor regulations from each one.”
Confirming agency identity before filtering
“I'm not sure if the FDA is listed under its full name or a short name in the Federal Register — can you search for 'FDA' and tell me its official slug and parent agency?”
Technical details
Endpoint
GEThttps://us-regulations.use.x402atlas.com/agencies?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to resolve a human-readable agency name or abbreviation into the exact Federal Register slug required by regulation search or filter endpoints. Prefer this over guessing slugs, as agency names may have unexpected formatting (e.g. hyphens, abbreviations). Essential as a prerequisite step before calling US Regulation Search, US Regulation Counts, or US Regulation Updates endpoints on the same platform.
Side effects
- Empty results array if no agency matches the query substring
- Query too long (over 200 characters) rejected at input validation
- Network or payment authorization failure returns no data
- Ambiguous short substring may return too many results requiring refinement
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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