Small, reliable, pay-per-call HTTP tools for autonomous agents. Priced in USDC on Base via the x402 protocol — no account, no API keys, no subscription. Pay per request; that's it.
HTTP 402 with payment requirements; your x402 client signs a USDC payment and retries; you get the result. Each tool also exposes a machine-readable manifest at /.well-known/x402. Payments settle peer-to-peer on Base — nothing custodial.
Repair malformed/truncated JSON and validate it against a JSON Schema in one call — a reflex fix for tool-using agents instead of burning model tokens.
POST https://jsonguard.leeworks.dev/v1/validate
{ "data": "{name: test,}", "schema": { "type":"object" } }
→ { repaired, parsed, valid, errors }
Crypto primitives for on-chain agents: keccak256, EIP-191 signature recovery, EIP-712 typed-data verification, and Merkle tree roots/proofs — no crypto libs to ship into your sandbox.
POST https://chainkit.leeworks.dev/v1/crypto
{ "op": "merkle_proof", "leaves": ["0xabc...","0xdef..."], "leaf": "0xabc..." }
→ { root, proof }
Structured diffs and RFC-6902 JSON Patch (generate / apply) — so coding and editing agents emit minimal patches instead of rewriting whole files.
POST https://difftool.leeworks.dev/v1/diff
{ "op": "json_patch", "a": {"x":1}, "b": {"x":2} }
→ { patch: [ { "op":"replace","path":"/x","value":2 } ] }
A one-off download: an on-chain-verified map of where agents actually earn crypto, an x402 flow reference, and MIT-licensed tooling. Orientation, not an income promise.
GET https://x402.leeworks.dev/kit