AI agents

exposeTapeAPI turns any TapeAPI service into tools an AI agent in the browser can call, through WebMCP's document.modelContext. The agent never receives what a page merely claims: every call goes through the SDK, so each answer is an envelope verified against the key the circuit's holder authorised on chain. A tampered or unsigned answer reaches the agent as an error.

import { createTapeAPI } from '@tapeapi/sdk'
import { exposeTapeAPI } from '@tapeapi/sdk/webmcp'

const api = createTapeAPI({
  rpcUrls: ['https://bsc-dataseed.bnbchain.org', 'https://bsc-dataseed1.defibit.io', 'https://bsc-dataseed1.ninicoin.io'],
  quorum: 2,
})
const handle = await exposeTapeAPI(api, '0x<container>')     // free methods only, by default
// handle.tools, handle.skipped, handle.refresh(), handle.dispose()

#Money

Paid methods are not exposed unless the page passes a budget:

await exposeTapeAPI(api, '0x<container>', {
  paid: { payer, maxPriceBEM: '0.001', budgetBEM: '0.05', confirm: async ({ method, priceBEM }) => window.confirm(`Pay ${priceBEM} BEM for ${method}?`) },
})

• maxPriceBEM caps each call, budgetBEM caps the total, and confirm can ask the human before each paid call.
• A price rise is never paid: the call fails with PRICE_CHANGED and the tool is withdrawn until the human calls api.acceptPrice(svc, method) and handle.refresh().

#Desktop agents

manifestToTools(manifest, opts) is the pure part, with no DOM: a Node MCP server can use it to offer the same tools to a desktop agent.

#Try it

node examples/reader-service/index.mjs

Then serve the repository and open examples/webmcp/ in a browser; its README explains the demo.