Verify every measured figure.

Rate sheet

Compare two saved data snapshots

The free compare_rwa_snapshots tool compares yield, issuer divergence, source dates and availability in two supplied Rates responses.

Choose a numerical threshold in basis points. The report shows changes crossing that threshold and explains which rows cannot be compared. It makes no claim about economic significance and does not fetch new data.

POST https://api.402rates.com/v1/rwa/changes

Inputs, example and limits.

The exchange

An agent asks, gets a price, pays inside the same request, and receives the data. No signup stands between the question and the answer.

connecting…

Pay on any of these

• Base
• Polygon
• Arbitrum
• XDC

The 402 response lists the currently available payment networks. Your agent selects one. The settlement comparison measures transfer costs separately, with the inputs and scope disclosed for each reported network.

First call

See the payment terms for yourself. This costs nothing:

curl -i https://api.402rates.com/v1/settlement/costs

To buy the data, point any x402 capable client at the same URL. It reads the terms from the 402, pays in USDC, and retries. Gas is sponsored, so your agent only needs the stablecoin.

Use it as an MCP server

Rates product access · Complete tool directory

Same data, same prices, over the Model Context Protocol. Streamable HTTP, no account and no API key. 9 MCP tools: 6 free and 3 paid. 11 HTTP capabilities including shared service information. Free tools include the product catalogue, manifest, instrument state, source history, lowest settlement-cost result and supplied-snapshot comparison. Paid tools provide the full cost comparison (0.01 USDC), RWA yields (0.03 USDC) and all instrument records (5 USDC). The three-distinct-instrument hourly allowance is shared by instrument and history calls. Payment setup and examples.

• Claude Code
• Cursor
• VS Code
• Config file

claude mcp add --transport http 402rates https://api.402rates.com/mcp/rates

cursor://anysphere.cursor-deeplink/mcp/install?name=402rates&config=eyJ1cmwiOiJodHRwczovL2FwaS40MDJyYXRlcy5jb20vbWNwL3JhdGVzIn0=

code --add-mcp '{"name":"402rates","type":"http","url":"https://api.402rates.com/mcp/rates"}'

{
  "mcpServers": {
    "402rates": {
      "type": "http",
      "url": "https://api.402rates.com/mcp/rates"
    }
  }
}

A client that cannot pay still gets the full payment terms back as structured content rather than an error, so it can decide what to do. A client that can pay reads those terms, signs, and retries on its own.

From a free sample to a paid call

Inspect one instrument for free, then buy its yields or the complete snapshot through MCP or HTTP. The integration guide includes installation commands, payment limits and complete downloadable programs.

Free coverage · HTTP yield purchase · MCP RWA purchase

The Node purchase examples require a Base wallet with USDC and a key supplied through your local environment. Yield purchases are capped at 0.03 USDC; the 5 USDC full snapshot requires the explicit --snapshot option.

Machine-readable documentation: llms.txt, OpenAPI manifest, and the RWA instrument schema. Paid complete-dataset use is governed by the data terms.

Where this stands

Built in the open, so here is the honest state of it rather than a roadmap that flatters us.