# ToolMint Docs Deltas

> Exported-API deltas between npm versions from published TypeScript declarations, for coding agents planning upgrades.

- Status: Coming soon
- Price: $0.01–$0.02 / call (x402 exact, USDC on Base eip155:8453, payTo 0xfbF7413bcB3a604936775C96FDbe0b0C9c9E37F5)
- Planned URL: https://toolmint-docs-deltas.toolmint.workers.dev
- OpenAPI: https://toolmint.toolmint.workers.dev/tools/docs-deltas-json/openapi.json

## Routes

- `GET /delta` $0.02: What changed in an npm package's exported API between two versions, read from its published TypeScript declarations: added, removed, changed signatures, members, newly @deprecated. Example: pkg=zod&from=3.22.4&to=3.23.8
- `GET /surface` $0.01: Exported API surface of one npm package version from its TypeScript declarations (names, kinds, normalized signatures, members, @deprecated). Example: pkg=ky&version=1.2.0