@routescore/mcp

The read-only pre-sign evidence layer — a "pre-sign journal" — for onchain agents.

Before an agent (or you) signs a swap onchain, check_swap returns a modeled read of route quality, MEV/execution exposure, and token-registry recognition as a clear / caution / unsupported verdict with its caveats — and persists a hash-verifiable record of exactly what was known before signing, re-verifiable offline. That record is the pre-sign journal. It is read-only: it never signs, executes, routes funds, or custodies assets.

An MCP server (and a keyed REST API) for Claude, Codex, Cursor, and any MCP-capable agent — a thin, stateless wrapper around the Routescore public API, storing no request or response data locally.

check_swap is free. A free API key runs 100 pre-sign checks/day (Pro 1,000/day, Power 10,000/day); the modeled premium-estimate tools, simulate_scenario, and persisted-record retrieval are Power-tier. Generate a key at Account → Developer → API & MCP access (/account) — free to mint on any plan. Keys look like rs_live_… and are shown once.

See how these modeled reads have tracked measured on-chain outcomes on the public calibration surface — Routescore publishes its own accuracy (Brier score, ECE, coverage), re-derivable from a bound source manifest.

Setup

Add the server to your MCP client config and set your key in the env block.

Claude Desktop (claude_desktop_config.json) / Cursor (.cursor/mcp.json):

{
  "mcpServers": {
    "routescore": {
      "command": "npx",
      "args": ["-y", "@routescore/mcp"],
      "env": {
        "ROUTESCORE_API_KEY": "rs_live_your_key_here"
      }
    }
  }
}

Claude Code (CLI):

claude mcp add routescore --env ROUTESCORE_API_KEY=rs_live_... -- npx -y @routescore/mcp

Optional env:

• ROUTESCORE_API_URL — override the API base (default https://www.routescore.io). Useful for local development: http://localhost:3000.

The server checks the key at startup: if ROUTESCORE_API_KEY is missing or does not match the minted key shape (rs_live_ followed by 64 lowercase hex characters), it exits immediately with an actionable error instead of failing on the first tool call. The configured value is never echoed. This is a shape check only — real key verification stays server-side (run the whoami tool).

Related MCP server: defi-yield-scanner-mcp

Tools

All quote_* tool results are modeled, point-in-time premium estimates — decision support only, not a live cover, insurance, refund, or premium-acceptance offer. Routescore does not underwrite risk.

Output contract

Routescore MCP is decision support, not execution infrastructure. check_swap, quote, and scenario tool results preserve the same trust envelope as the REST API, and the wrapper marks output as degraded if the upstream API ever omits required trust fields.

check_swap answers verdict: unsupported as an HTTP 422 with a full evaluated body — an answer, not an error. The wrapper relays those evaluated 422 bodies as normal structured tool results (gap-state fields, caveats, and record linkage included) so agents receive "not evaluated" as first-class evidence; true errors (400/401/403/404/429/5xx and non-evaluated 422 error envelopes) still surface as tool errors.

Downstream agents and dashboards should render the trust-envelope fields by default (abbreviated example):

{
  "score_state": "partial",
  "source_freshness": {
    "state": "partial",
    "checked_at": "2026-06-21T00:00:00.000Z",
    "sources": [
      { "name": "routescore_backend", "freshness_state": "fresh" },
      { "name": "bridge_risk_labels", "freshness_state": "unknown" }
    ]
  },
  "methodology_version": "routescore.public_api.v1",
  "confidence_band": { "low": null, "high": null, "unit": "bps" },
  "caveats": [
    "Modeled, point-in-time decision support. Not an execution guarantee.",
    "Unsupported or stale inputs widen uncertainty instead of hiding risk."
  ],
  "commercial_disclosure": {
    "paid_placement": false,
    "score_influenced_by_partner": false
  }
}

Local development

npm install
npm run build
ROUTESCORE_API_KEY=rs_live_... ROUTESCORE_API_URL=http://localhost:3000 node dist/index.js

Then point MCP Inspector at the command, or wire it into a client config as above.

Public Reddit research utility

The retail-research workflow includes a standard-library parser for a saved, publicly rendered old Reddit thread. It extracts public handles, comment counts, IDs, and permalinks without logging in or attempting to recover deleted authors:

python3 scripts/scrape_reddit_public_handles.py /path/to/thread.html \
  --csv work/reddit-public-handles.csv \
  --json work/reddit-public-handles.json

The input must be HTML already obtained from a public old.reddit.com thread. The parser does not fetch pages or bypass Reddit access controls.

Notes

• Scenario and quote outputs are modeled decision-support, not investment advice.

• MCP does not custody assets, execute transactions, route funds, or guarantee outcomes.

• Rate limits apply per key; responses carry X-RateLimit-* headers.