# BitBooth

> PageDelta is BitBooth's primary public product: render a public page and tell an agent what changed for $0.01 per observation.

PageDelta returns rendered Markdown, exact focus evidence, bounded line changes, optional visual evidence, hashes, a payer-scoped observation cursor, and payment identity. It works on public pages only. Baselines are scoped to payer + canonical URL + extraction mode and retain only the latest observation for a bounded period.

No BitBooth buyer account, API key, or subscription is required. Call the route without payment to receive an x402 v2 `PAYMENT-REQUIRED` challenge, select one advertised requirement, then retry with a signed payment. Never reuse a payment proof. Treat the live challenge as canonical for price, asset, network, and payment destination.

The live catalog currently contains 1 paid resources.

## Start with PageDelta

- [PageDelta route](https://app.heinrichstech.com/v1/cdp/render-pro): POST a public URL; each observation currently costs $0.01 on the route's advertised stablecoin rails.
- [PageDelta documentation](https://app.heinrichstech.com/endpoints/render-pro): Request body, live-challenge flow, and response contract.
- [Official MCP Registry record](https://registry.modelcontextprotocol.io/v0.1/servers?search=io.github.Drock91%2Fbitbooth-fetch): `io.github.Drock91/bitbooth-fetch` is active; latest version `2.3.1`. Install the exact pin `@bitbooth/mcp-fetch@2.3.1` from [npm](https://www.npmjs.com/package/@bitbooth/mcp-fetch). Start without a wallet for free discovery and preflight; paid tools appear only after explicit wallet and spend-cap configuration.

## Agent entry points

- [Find an API](https://app.heinrichstech.com/discover.json): Free plain-text search that returns a short, call-ready list. No signup, API key, or payment required.
- [Paid API OpenAPI](https://app.heinrichstech.com/openapi.json): OpenAPI 3.1 document for every advertised /v1/cdp operation, generated from the canonical catalog.
- [x402 catalog](https://app.heinrichstech.com/bazaar.json): Live resource URLs, methods, descriptions, prices, assets, networks, and payment destinations.
- [x402 service descriptor](https://app.heinrichstech.com/.well-known/x402.json): Well-known discovery mirror for x402 indexers and clients.
- [Service health](https://app.heinrichstech.com/v1/health): Public liveness check for the BitBooth gateway.

## Seller entry points

- [Full gateway OpenAPI](https://app.heinrichstech.com/openapi.yaml): Tenant signup, route management, payment reporting, and public gateway schemas.
- [Postman collection](https://app.heinrichstech.com/bitbooth.postman_collection.json): Importable collection for exercising the challenge and payment flow safely.

## Optional

- [Human catalog](https://app.heinrichstech.com/bazaar): Browse the same paid-resource catalog as rendered HTML.
- [Agent integration guide](https://app.heinrichstech.com/docs/agents): Browser documentation for integrating an agent wallet with BitBooth.
- [Capability manifest](https://app.heinrichstech.com/.well-known/agent.json): BitBooth-specific priced skill inventory. This is not an A2A task endpoint.
- [Contact](mailto:derek@heinrichstech.com): PageDelta integration pilots, seller onboarding, and support.