How much does a call cost?

$0.04 USDC on Base, paid with x402 before the operation runs.

POST JSON to /api/v1/grant-compliance/eligibility-check. An unpaid request returns 402. Pay the exact USDC amount on Base, then retry with payment-signature and Idempotency-Key.

Check supplied eligibility rules API

Compare each supplied rule with the supplied fact of the same name. A match is not an approval, and missing facts are not filled in.

The Check supplied eligibility rules operation is part of the Grant Compliance API on BRAINIAC.software. Compare each supplied rule with the supplied fact of the same name. A match is not an approval, and missing facts are not filled in. It is exposed as POST /api/v1/grant-compliance/eligibility-check and priced at $0.04 USDC on Base. Payment uses the x402 exact scheme: an unpaid call returns HTTP 402 with payment requirements; after paying the exact USDC amount, retry the same request with a payment-signature header and Idempotency-Key. No account and no API key are required. Data sources for this product: Grant guidelines, application text, budgets, evidence, and rules supplied in the request. Limitations: Grant rules, eligibility criteria, and approval outcomes are not invented. A met rule or a balanced budget is not an official approval or a compliance determination. Requirements, deadlines, and reporting obligations are read only from labeled lines or structured fields. Evidence is matched by the supplied requirement id. The strength of the evidence is not judged. Outputs are compliance prechecks, drafts, or data lookups for human review. They are not official determinations, legal advice, identity confirmation, or certified filings. Related operations in this group include Extract grant requirements, Check application completeness, Validate a grant budget, Check expenses against supplied rules. Open the group documentation for the full request schema, field notes, and response examples before integrating.

POST$0.04 USDC

/api/v1/grant-compliance/eligibility-check

Example request

curl -i -X POST "https://www.brainiac.software/api/v1/grant-compliance/eligibility-check" \
  -H 'content-type: application/json' \
  -H 'Idempotency-Key: <fresh-64-character-random-hex-key>' \
  --data-binary @- <<'JSON'
{
  "rules": [
    {
      "id": "org",
      "fact": "organisationType",
      "operator": "equals",
      "value": "charity"
    },
    {
      "id": "years",
      "fact": "yearsOperating",
      "operator": "number_at_least",
      "value": "2"
    }
  ],
  "facts": [
    {
      "name": "organisationType",
      "value": "charity"
    },
    {
      "name": "yearsOperating",
      "value": "1"
    }
  ]
}
JSON

An unpaid probe returns HTTP 402 with x402 payment requirements. After paying the exact USDC amount on Base, retry the identical request with a payment-signature header.

FAQ

Do I need an API key? No. Pay the listed USDC amount with x402.
What network? Base (eip155:8453), USDC.
Is this an official determination? No. Results are for human review against the cited sources.

Extract grant requirements — $0.04 USDC
Check application completeness — $0.04 USDC
Validate a grant budget — $0.05 USDC
Check expenses against supplied rules — $0.04 USDC

Check supplied eligibility rules API

Example request

FAQ

Related operations

Related APIs