Bitcoin x AI: Gated 402 API

Description

This is a simple API that uses a Stacks smart contract to verify access to a resource.

If the user has access, the API returns a 200 status code.

If the user does not have access, the API returns a 402 status code with instructions to pay the invoice.

Example Endpoint

URL: /bitcoin-face

Requires header: X-Stacks-SignedMessageData

• data to be signed is the requesting Stacks address as a string
• data passed in header should be the string returned by signing structured data with @stacks/transactions
• helper script defines domain, message format, and returns signed data

Query parameters:

• address (req): the Stacks address requesting the resource
• resource (req): the name of the resource in the smart contract
• network (opt): the Stacks network to return data from ("mainnet" or "testnet", default: "testnet")

Example with curl for local development:

curl -X GET -H "X-Stacks-SignedMessageData: 424b7c7d4faf0dc3edb5e3ce686341621e9305fdd00434dd15a1254a9ce3a60d3ed5def54e9d588a1d12e499411c42af8f897c497aeb5ff4566cec18afc0052500" "http://localhost:8787/bitcoin-face?resource=bitcoin-face&address=ST2HQ5J6RP8HSQE9KKGWCHW9PT9SVE4TDGBZQ3EKR"

Example with curl with hosted API:

curl -X GET -H "X-Stacks-SignedMessageData: 424b7c7d4faf0dc3edb5e3ce686341621e9305fdd00434dd15a1254a9ce3a60d3ed5def54e9d588a1d12e499411c42af8f897c497aeb5ff4566cec18afc0052500" "https://api.aibtc.dev/bitcoin-face?resource=bitcoin-face&address=ST2HQ5J6RP8HSQE9KKGWCHW9PT9SVE4TDGBZQ3EKR"

Development

Tech stack:

• Wrangler
• Hono
• Stacks.js

To run this locally:

1. Clone repository
2. Install dependencies: npm install
3. Run locally: npm start

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