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Blockchains (Blockchain Lab) building blocks

Open-source repositories under github.com/Blockchains documented as composable building blocks: data APIs and SDKs, an MCP server with blockchain tools for AI agents, tested Solidity contracts, project composers, browser tools and curated fork indexes. Each repo has AGENTS.md (how to work in it), llms.txt and a blocks.json manifest (exports, inputs, outputs, compatible blocks, tests).

For agents: Hub of open-source blockchain building blocks: data APIs, SDKs, an MCP server with blockchain tools for AI agents, Solidity contracts, with machine-readable blo

blockchain building blocksmcp serversolidity contractsblockchain data apiopen source sdkagents.md

Their llms.txt

The beginning of the file, from our validated copy saved 2026-10-24T12:02:56.627Z. Cached copy · Source on blockchains.github.io

# Blockchains (Blockchain Lab) building blocks

> Open-source repositories under github.com/Blockchains documented as composable building blocks: data APIs and SDKs, an MCP server with blockchain tools for AI agents, tested Solidity contracts, project composers, browser tools and curated fork indexes. Each repo has AGENTS.md (how to work in it), llms.txt and a blocks.json manifest (exports, inputs, outputs, compatible blocks, tests).

Start with the guide (layer map, how to assemble a project, three verified recipes). Then pick blocks from https://blockchains.github.io/blocks.json, read the block's AGENTS.md, install from its entrypoints and run its tests command. Pin a tag or commit. Nothing here requires an API key except Grok (xAI) features.

## Start here
- [Build with Blocks](https://github.com/Blockchains/.github/blob/main/docs/BUILD-WITH-BLOCKS.md): how to assemble projects from these repos, with 3 verified end-to-end recipes
- [blocks.json](https://blockchains.github.io/blocks.json): machine-readable catalogue of every block (35 repos)
- [Blocks schema](https://github.com/Blockchains/.github/blob/main/docs/BLOCKS-SCHEMA.md): blocks.json format ([JSON Schema](https://raw.githubusercontent.com/Blockchains/.github/main/docs/blocks.schema.json))
- [Full text](https://blockchains.github.io/llms-full.txt): guide + schema + every repo's AGENTS.md in one file
- [services.json](https://blockchains.github.io/services.json): the hub's 79 hosted services

## Data, APIs and SDKs
- [blockchainlab-api](https://raw.githubusercontent.com/Blockchains/blockchainlab-api/main/llms.txt): Free, static, CORS-enabled JSON API of 20 blockchain datasets rebuilt nightly from public sources (chainid.network, DefiLlama, L2BEAT, OFAC via 0xB10C, ethereum/EIPs, bitcoin/bips, Blockchain Lab corpus). No key, no backend.
- [blockchainlab-feeds](https://raw.githubusercontent.com/Blockchains/blockchainlab-feeds/main/llms.txt): Public JSON feeds for blockchainlab.com: hackathons/grants/bounties, events, clustered X intel and mentions (public post IDs, links, handles, short trimmed summaries, counts only), built daily.
- [blockchainlab-sdk](https://raw.githubusercontent.com/Blockchains/blockchainlab-sdk/main/llms.txt): Typed TypeScript and Python clients for the Blockchain Lab Open Data API: 20 nightly-rebuilt blockchain datasets (chains, RPC health, DeFi TVL, stablecoins, yields, L2 metrics, hacks, OFAC addresses, EIPs/ERCs/BIPs, grants, hackathons).
- [memecoin-markets](https://raw.githubusercontent.com/Blockchains/memecoin-markets/main/llms.txt): CoinMarketCap-style memecoin rankings + SEO token pages (holders, LP, charts, rug/honeypot scan), pump.fun bonding curves, Raydium LP burn, Jupiter sell depth, token-list and scam-list checks for memecoin.markets; scanner, radar, UK CGT PnL. Zero-dep SDK, MCP, static JSON API, Pages app. Free public data, no keys.
- [onetouchswitch-bridge](https://raw.githubusercontent.com/Blockchains/onetouchswitch-bridge/main/llms.txt): Provider/
…

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Claim my listing on Agent Web Map for blockchains.github.io:
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