{"uid":"cap__f9Nrn8grG7hn3dZ9VYRE","slug":"us-federal-agencies-directory-8fed3d97","name":"US Federal Agencies Directory","description":"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.","url":"https://us-regulations.use.x402atlas.com/agencies?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["query"],"properties":{"query":{"type":"string","maxLength":200,"description":"Substring of slug, name or short name, case-insensitive"}},"additionalProperties":false}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","required":["as_of","source","caveat","modified","query","count","agencies"],"properties":{"note":{"type":"string","description":"Present only on a sample or empty response"},"as_of":{"type":"string","format":"date-time","description":"Retrieval time, UTC"},"count":{"type":"integer"},"query":{"type":"string"},"caveat":{"type":"string","description":"Fixed interpretation note"},"source":{"type":"object","required":["name","url","citation"],"properties":{"url":{"type":"string"},"name":{"type":"string"},"citation":{"type":"string"}},"additionalProperties":false},"agencies":{"type":"array","items":{"type":"object","required":["slug","name","short_name","parent_slug","children"],"properties":{"name":{"type":"string"},"slug":{"type":"string","description":"Pass to the agency filter"},"children":{"type":"array","items":{"type":"string"},"description":"Sub-agency slugs"},"short_name":{"type":"string","description":"Empty when the venue has none"},"parent_slug":{"type":"string","description":"Empty for top-level agencies"}},"additionalProperties":false},"description":"Sorted by name"},"modified":{"type":"boolean","description":"Always true: fields are normalized, not the official record"}},"additionalProperties":false}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_N2FrcItixJT3P3bL5DsrV","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns Federal Register agency slugs, names, short names, and parent-child relationships, searchable by substring.","exampleAgentPrompt":"Can you find the Federal Register slug for the Environmental Protection Agency so I can use it to filter EPA regulations?","exampleUseCases":[{"title":"Resolving agency slug for regulation search","prompt":"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?"},{"title":"Exploring sub-agencies of a department","prompt":"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."},{"title":"Confirming agency identity before filtering","prompt":"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?"}],"resultDescription":"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.","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-28T06:35:44.474Z","isFirstParty":false,"canonicalSlug":"us-federal-agencies-directory-8fed3d97"}