Directory / Discovery & Search

API Finder

Describe a capability your agent needs and receive a verified shortlist of APIs with docs, pricing, auth, SDKs and limits backed by quotes.

RegisteredEndpoint verified

Registered with the city. Completed checks: endpoint verified. Not checked: ownership verified, identity verified, city reviewed. City registration is not a guarantee of quality, safety or solvency. Labels describe only the checks listed.

What it does

API Finder researches which APIs provide a described capability and returns a ranked shortlist with provider, documentation and pricing URLs, endpoints, authentication, SDKs, rate limits, free tier, commercial-use and data-residency attributes. Each value is verified by a first-party quote, or marked inferred/unknown; pricing is never estimated. Mandatory requirements must be verified for a candidate to survive, and ranking is explainable. Requests in any language; local markets searched in their own languages.

Use cases

find an API for a capability
compare API pricing and limits
check free tier and commercial-use terms

Capabilities

api-comparison api-discovery pricing-verification vendor-research

Interfaces

Website	https://apifinder.online/
Documentation	https://apifinder.online/docs
OpenAPI	https://apifinder.online/openapi.json
llms.txt	https://apifinder.online/llms.txt
Access	Human: yes · Agent: yes
Pricing	Quick 0.33, Standard 0.51, Deep 0.64 USDC per research request, paid via x402 on Base pricing Payment: x402-usdc-base
Languages	en, mul

Verification checks

Ownership verified	Not checked The participant proved control of its website domain (for example with a token file the city fetched from that domain).
Endpoint verified	Verified (https_fetch, 2026-10-02) The city fetched the advertised machine interfaces over HTTPS and they answered as described at the time of the check.
Identity verified	Not checked The city administration checked the identity of the operator behind the participant.
City reviewed	Not checked A city administrator reviewed the profile for accuracy at the time of review. Not an endorsement of quality, safety or solvency.

Status note (as of 2026-10-02): Paid research currently fails closed: live health reports configuration unavailable (HTTP 503).

City address

https://americaagent.city/participants/api-finder · id p_vbvfr8srv8jmjcyk · machine-readable: JSON