Blocksize Market Data MCP

Read-only Model Context Protocol (MCP) package for Blocksize real-time market-data discovery.

This package gives MCP clients a GitHub-hosted, installable wrapper around the public Blocksize discovery surface. It helps agents search supported instruments, inspect pricing, review the product catalog, find docs, and build exact paid HTTP URLs for live data. It does not fetch live prices, submit x402 payment proofs, move funds, store credentials, or execute trades.

Free Tier and Subscriptions

Signed-in users of the Claude, ChatGPT and Cursor connectors receive 30,000 free live-data credits every calendar month under an evaluation licence with "Data by Blocksize" attribution. One price list applies everywhere: 1 credit = $0.001 USDC, so every product costs the same in credits as it does in USDC over x402 (core crypto 2, long-tail crypto 4, FX and metals 5, tokenized equities 8, workflow products 100 to 2,500). Production use continues with a subscription from EUR 49/month (free trial at https://mcp.blocksize.info/go/free-trial, plans at https://mcp.blocksize.info/go/pricing) or direct x402 payment. Discovery tools in this package are free and read-only; live market data and premium workflow endpoints return an HTTP 402 Payment Required challenge for x402 settlement when called without connector credits. Terms: https://blocksize.info/terms-conditions-data/.

Related MCP server: market-data-mcp

State Data

The hosted Blocksize API includes state-data and oracle-aware coverage for supported assets. State price requests use /v1/state/{pair} and resolve supported protocol/pool symbols through Blocksize state_instruments plus state_pool data when coverage exists. Examples include protocol symbols such as MSOLUSD, JUPSOLUSD, and WSTETHUSD.

Tools

• search_pairs - search supported symbols and metadata.

• list_instruments - list instruments for vwap, bidask, fx, or metal.

• get_pricing_info - inspect current pricing, free-tier positioning, and supported settlement rails.

• get_product_catalog - inspect raw data and premium workflow products, including credit costs, state-data products, endpoint templates, and upgrade path.

• get_market_data_endpoint - build a paid x402 HTTP endpoint URL without calling it, including /v1/state/{pair} for state data.

• search - search Blocksize docs/catalog entries.

• fetch - fetch one docs/catalog entry returned by search.

Install From GitHub

{
  "mcpServers": {
    "blocksize-market-data": {
      "command": "uvx",
      "args": [
        "--from",
        "git+https://github.com/jf-cmyk/blocksize-agentic-payments-mcp",
        "blocksize-agentic-payments-mcp"
      ]
    }
  }
}

Run Locally

git clone https://github.com/jf-cmyk/blocksize-agentic-payments-mcp
cd blocksize-agentic-payments-mcp
uv run blocksize-agentic-payments-mcp

Optional environment variable:

BLOCKSIZE_BASE_URL=https://mcp.blocksize.info

Public Hosted Remote MCP

Agents that support hosted Streamable HTTP MCP can also connect directly to:

https://mcp.blocksize.info/mcp/server/

Live Data Boundary

Live production market data is available through Blocksize's paid x402 HTTP API, not through this package's discovery tools. The endpoint-builder tools only return URLs and guidance; a direct HTTP call without connector credits or payment returns a 402 Payment Required challenge.

Useful links:

• Homepage: https://mcp.blocksize.info/

• Product catalog: https://mcp.blocksize.info/data-packages.json

• OpenAPI: https://mcp.blocksize.info/openapi.json

• Quickstart: https://mcp.blocksize.info/quickstart/remote-mcp

• Support: https://mcp.blocksize.info/support

• Glama connector: https://glama.ai/mcp/connectors/info.blocksize.mcp/agentic-payments

• Smithery: https://smithery.ai/servers/blocksize/agentic-payments?capability=tools#performance