Structured Reference Data.
Signed, sourced, and cheap to read.
Token-compressed component and developer-API reference data for agents. Every response is Ed25519-signed and verifiable against our published key, and every record cites its source. Pay per query from a prepaid metered key.
No card required. Accuracy is best-effort, not guaranteed — see terms.
Free tier: 50 queries per key per day, no card required, plus $0.05 of trial credit. Paid queries cost $0.001–$0.02 depending on the tier.
We use your email only for service notices and billing — see privacy. Programmatic equivalent: POST /api/v1/keys/create
Add it as an MCP server, or call the HTTP API directly. There is no SDK to install.
Agent-readable docs: /llms.txt · /.well-known/mcp.json
Real responses from the live API. Create a key above and tick "Attach Auth Key" to see paid tiers; without one you will see the 402 an agent gets.
Executing query...
Prepaid credit, debited per successful query. Cached revalidations (HTTP 304) and rate-limited requests are never charged.
| Component specification lookup | $0.001 |
| API schema lookup | $0.002 |
| Natural-language catalogue search | $0.003 |
| Deprecation and sunset radar | $0.005 |
| Auth and error playbook | $0.005 |
| Cross-service capability search | $0.005 |
| Integration brief | $0.01 |
| Dependency upgrade advisory | $0.02 |
| Breaking-change and migration analysis | $0.02 |
| Free tier | 50/day |
Agents cannot enter card details. When credit runs low, an agent calls
factgrid_create_topup_link and hands the link to a human — or you can turn on optional
automatic top-up.