TapeAPI: signed BNB Chain reads MCP server

TapeAPI

Tape out a circuit, and its container is your API. Every response is signed by it, anyone can verify it against the chain, and containers can talk to each other over end-to-end encrypted channels.

TapeAPI is the service and communication layer of the TapeOut ecosystem on BNB Chain. In that ecosystem, DeWEB is websites, TapeSend is messaging, and TapeAPI is services.

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Status: pre-alpha (v0.4.0). The free tier needs no contract of ours and runs on TapeOut's deployed contracts.

Our own contracts (the paid-call escrow, the service directory, ChannelBus) are not audited by a third party;

ChannelBus is deployed (address below). Interfaces may still change. The TAP

numbers below are proposed to the TapeKit maintainers and not yet assigned.

Try the live service in 30 seconds

A free public service runs at https://api.tapeapi.fun under the TapeOut name 11.1013.tape. Ask it for the BNB price:

curl -s https://api.tapeapi.fun/tapeapi/v1/bnbUsd -H 'content-type: application/json' -d '{"id":"1","params":{}}'

curl shows you the signed envelope (result, container, ts, block, sig) but does not check it. The SDK does. The packages are not on npm yet, so set up the repository once (Node.js 20 or later):

git clone https://github.com/BruceLanLan/tapeapi.git && cd tapeapi && npm install

Or install just the SDK into your own project from the GitHub release (not the npm registry):

npm install https://github.com/BruceLanLan/tapeapi/releases/download/v0.4.0/tapeapi-sdk-0.4.0.tgz

Save this as try.mjs inside the tapeapi directory (@tapeapi/sdk resolves through the repository's workspace; a script saved anywhere else fails with ERRMODULENOT_FOUND) and run node try.mjs:

import { createTapeAPI } from '@tapeapi/sdk'

const api = createTapeAPI({
  rpcUrls: ['https://bsc-dataseed.bnbchain.org', 'https://bsc-dataseed1.defibit.io', 'https://bsc-dataseed1.ninicoin.io'],
  quorum: 2,
})
const svc = await api.resolve('11.1013.tape')             // name -> container -> on-chain manifest -> holder's delegation
const { result, verified } = await api.call(svc, 'bnbUsd', {})
console.log(result, verified)                              // verified is true only after the signature checked out

No install at all: the playground runs the same SDK in the browser. Every method of the public service is listed in Public API.

Use it from Claude, Cursor or any MCP client

The same eight methods are MCP tools at https://api.tapeapi.fun/mcp (Streamable HTTP, no key). In Claude, add it under Settings > Connectors > Add custom connector; in Cursor, add it to mcp.json:

{ "mcpServers": { "tapeapi": { "url": "https://api.tapeapi.fun/mcp" } } }

Shortened. The full README is on GitHub.