Agency Directory API: US federal toptier agency directory: name/abbreviation search, toptier — USAspending and NIH RePORTER
US federal toptier agency directory: name/abbreviation search, toptier code and current budget authority, sorted by budget size. One call replaces the agency reference crawl. Free, no key.
Free — no key, no signup, rate-limited to 60 calls per minute per client.
How do you call it?
GET /v1/funding/agencies — product id
funding_agency_directory. Over MCP, call answerpool_get with
product_id=funding_agency_directory.
curl "https://answerpool.io/v1/funding/agencies?q=defense"Live call: https://answerpool.io/v1/funding/agencies?q=defense · JSON sample: /v1/samples/funding_agency_directory
What does the answer look like?
A representative response, the same static sample served at /v1/samples/funding_agency_directory.
as_of | 2026-09-03T02:00:00Z |
|---|---|
count | 1 |
disclaimer | Reference data from USAspending.gov (US federal public domain); not procurement advice. |
refresh_after | 2026-09-18T00:00:00.000Z |
agencies
| toptier_code | name | abbreviation | budget_authority_usd |
|---|---|---|---|
| 097 | Department of Defense | DOD | 1443341492804.44 |
The same sample as raw JSON
{
"as_of": "2026-09-03T02:00:00Z",
"count": 1,
"agencies": [
{
"toptier_code": "097",
"name": "Department of Defense",
"abbreviation": "DOD",
"budget_authority_usd": 1443341492804.44
}
],
"disclaimer": "Reference data from USAspending.gov (US federal public domain); not procurement advice.",
"refresh_after": "2026-09-18T00:00:00.000Z"
}How fresh is it, and where does the data come from?
The fastest source behind this answer can change daily, so every response carries a refresh_after timestamp — right now it would be 2026-09-18T00:00:00.000Z. Schedule the next call on that value rather than on a guess.
- USAspending (US federal public domain) — upstream:
https://api.usaspending.gov/api/v2
Method version 0.1.0 ·
serving cache 7 days ·
every response carries a result_id you can resolve at
/v1/provenance.
When should you use it?
You need an agency's toptier code, canonical name, or budget scale for spending queries.
What you skip building
- agency code guessing
- budget authority hunting
When should you not use it?
Federal Register regulatory agencies — that is /v1/regs/agencies (different slug space).
Where else can you find this?
- Catalog entry (JSON, free)
- OpenAPI schema — input and output types, prices, the 402 flow
- llms.txt — every product in one plain-text document