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x402 pay-per-call data tools for Base agents. Flagship get_intent ABSTAINS instead of guessing.
About
x402 pay-per-call data tools for Base agents. Flagship get_intent ABSTAINS instead of guessing.
Remote endpoints: streamable-http: https://xsignal-production.up.railway.app/mcp
Security Report
Valid MCP server (1 strong, 0 medium validity signals). No known CVEs in dependencies. Package registry verified. Imported from the Official MCP Registry. 1 finding(s) downgraded by scanner intelligence.
Endpoint verified · Open access · 2 issues found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
What You'll Need
Set these up before or after installing:
Environment variable: XSIGNAL_WALLET
How to Install & Connect
Available as Local & Remote
This plugin can run on your machine or connect to a hosted endpoint. during install.
Documentation
View on GitHubFrom the project's GitHub README.
⚡ xsignal
Pay-per-call data ingredients for AI agents on Base, via x402 (USDC). The flagship is the one thing no other x402
signal does: get_intent abstains — it returns "no verdict" (and says so) when it isn't confident enough, instead
of always answering and always charging. 3 free calls per wallet to try, then from $0.01. Verify-only: never
signs or moves funds.
The tools (flagship first)
| Tool / route | Price | What you get |
|---|---|---|
get_preflight · GET /preflight?addr=0x… | $0.05 | The composed Base preflight: fuses on-chain safety (SAFE/WATCH/AVOID + rug flags, via MainStreet) with momentum into one verdict — GO / CAUTION / AVOID. Safety gates momentum, so it never green-lights a token that can rug. |
get_intent · GET /intent?addr=0x…&min_confidence=0.7 | $0.01 | An outcome-priced momentum verdict (gaining/fading) only if confidence clears your bar, else a calibrated abstain. Paid answers carry a keyless tamper-evidence receipt. |
get_token_brief · GET /brief?addr=0x… | $0.05 | A meal: fuses market intel + cited social signal into a "what is happening with $TOKEN now" brief. |
get_signal · GET /signal?q=<topic> | $0.01 | A scored (virality + freshness) and cited real-time X/social signal. |
get_token_intel · GET /token?addr=0x… | $0.01 | Base token market data (liquidity/volume/price/age/flow + flags). Best as an input to the brief. |
POST /mcp | — | MCP (streamable-http): tools/list discovers the 5 tools; a tools/call returns an x402 payment pointer. |
GET /health · /.well-known/mcp.json · /.well-known/agent-card.json · /skill.md | free | health + agent discovery + the installable skill (no data). |
Try it free (3 calls per wallet)
Add ?wallet=0xYourAddress to any route for 3 free full results, so you can evaluate quality before paying. After 3,
that wallet pays via x402.
curl "https://xsignal-production.up.railway.app/intent?addr=0x4ed4E862860beD51a9570b96d89aF5E1B0Efefed&min_confidence=0.5&wallet=0xYourAddr"
Then run the example — a watchlist alerter that surfaces only the tokens confidently moving (and stays quiet on the rest):
WALLET=0xYourAddr node examples/watchlist-alerter.js
Pay with x402 (beyond the free probe)
The first post-probe request returns HTTP 402 with an accepts array (price in USDC, network base, payTo). Pay
with x402-fetch/x402-axios and a funded Base wallet, resubmit with the X-PAYMENT header, get the result. /intent
is pay-first: you pay, then get a verdict or an honest abstain.
Safety
We never sign or move funds. x402 means we receive USDC to payTo; payment is verify-only via a facilitator.
Signals are scored from public X posts + public DEX data — verify before acting; not financial advice. Confidence is a
mechanical heuristic, not a calibrated probability or a prediction.
Config (env)
| Var | Purpose |
|---|---|
XSIGNAL_PAYTO | address that receives USDC (public; no key). Default = the operator address. |
XSIGNAL_PRICE_USD / XSIGNAL_BRIEF_PRICE_USD / XSIGNAL_INTENT_PRICE_USD | per-call prices (default 0.01 / 0.05 / 0.01) |
XSIGNAL_PROBE_FREE | free probe calls per wallet (default 3) |
X402_NETWORK / FACILITATOR_URL | base (mainnet CDP, needs CDP_API_KEY_ID/CDP_API_KEY_SECRET) or base-sepolia (keyless x402.org) |
X_BEARER_TOKEN or XAI_API_KEY | live X/Grok source for get_signal (token intel + intent are keyless via DexScreener). No key → a labelled DEMO seed. |
Run
npm start # :4520
npm test # full self-test suite (signal · tokenintel · brief · intent · x402 · sources · server)
Zero runtime deps for the core (plain Node >=18); @coinbase/x402 is used only for CDP-facilitator auth on mainnet.
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