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
THE GREATER GOOD / GRANTSIGNAL PRICING
Two account-free ways to use the GrantSignal federal grant API. Pay once in USDC on Base mainnet through x402. Nothing renews automatically.
TWO FLAGSHIP CHOICES / BASE MAINNET USDC
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/preflightActivate 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/passMore 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