ToolSchema Forge
Deterministic LLM tool-schema conversion, linting and MCP manifest generation for OpenAI (incl. strict mode), Anthropic, Gemini and MCP, paid per call in USDC on Base via x402. Credit: 402 Index (MIT)
5 endpoints · $0.01–$7Unclaimed
2 APIs · 6 endpoints · Base network · x402 protocol
Live APIs
MailCheck API
Email address and domain checks for AI agents: syntax, MX, disposable/role/free flags, typo suggestions, SPF/DMARC/DKIM, RDAP and a deliverability grade. Pay per item with x402 (USDC on Base) or Lightning sats. No signup. Client note: Send a descriptive User-Agent header (e.g. User-Agent: mailcheck-client/1.0). Cloudflare blocks Python urllib's default User-Agent ("Python-urllib/3.x") on workers.dev with HTTP 403 "error code: 1010" before the request reaches this API. curl, python-requests and fetch work as-is. No API key is needed. Data: x402-list.com (CC BY 4.0) Credit: 402 Index (MIT)
1 endpoint · $0.001–$0.001About Unclaimed on PayAPI Market
- Live APIs
- 2
- Endpoints
- 6
- Settlement-verified APIs
- 0 of 2
- Categories
- Tools (2)
- Hosted at
mailcheck.toolschemaforge.workers.dev,toolschema-forge.toolschemaforge.workers.dev- First listed on PayAPI Market
- 2026-10-30
Questions about this provider
What APIs does Unclaimed offer?
Unclaimed has 2 live APIs on PayAPI Market with 6 endpoints in total, in Tools: ToolSchema Forge, MailCheck API.
Are Unclaimed's APIs verified?
Not yet. Unclaimed's listings are live and answer an x402 payment challenge, but PayAPI Market has not paid for a call to them, so none carries a settlement-verified badge.
How do I pay for Unclaimed's APIs?
Per request, in USDC, over the x402 protocol. An agent calls the endpoint, receives HTTP 402 with the price and wallet, pays and retries. There is no API key, account or subscription, and Unclaimed keeps 100% of each payment.