Pick yoursignal.

Two account-free ways to use the GrantSignal federal grant API. Pay once in USDC on Base mainnet through x402. Nothing renews automatically.

Pay for the rhythm you need.

01 / ONE-OFF$5 USDC

Shortlist preflight

Run deterministic checks over one to five selected Grants.gov notices: deadline horizon, listed applicant-type codes, source completeness, and manual-review flags.

POST /v1/grants/preflight
02 / 30 DAYS$15 USDC

Non-renewing API pass

Activate bearer-token access to the GrantSignal API for 30 days, with up to 1,000 calls. The pass expires once its term or call allowance is reached and must be purchased again after expiry.

POST /v1/grants/pass

More granular calls. Individual GrantSignal endpoints remain available from $0.05 per request. All paid API access uses x402 with USDC on Base mainnet; there is no account and no auto-renewal. GrantSignal is a discovery aid, not an eligibility or award determination. Human research services are not live.

Open the agent quickstart