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langchain - 💡(How to fix) Fix Community integration: Fía Signals crypto intelligence tools (x402 pay-per-call + MCP server) [1 comments, 2 participants]

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langchain-ai/langchain#35540•Fetched 2026-04-08 00:25:44
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Fía Signals — Crypto Intelligence for LangChain Agents

A production-ready crypto market intelligence API designed for AI agents.

Endpoints: https://fiasignals.com MCP server: https://fiasignals.com/.well-known/mcp.json x402 discovery: https://x402.fiasignals.com/.well-known/x402.json OpenAPI: https://fiasignals.com/openapi.json

Available as

  1. REST API — free tier, no auth required
  2. MCP server — 8 tools for Claude/Cursor/Windsurf
  3. x402 micropayments — USDC per call on Solana ($0.001-$0.50)
  4. Virtuals ACP — agent-to-agent hiring with escrow

Tools / Endpoints

  • Market regime detection (trending/ranging/volatile)
  • Technical signals (RSI, MACD, EMA, ADX) for 100+ tokens
  • Smart contract quick audit
  • MEV bot detection and sandwich attack risk
  • Wallet risk scoring
  • DeFi yield comparison (Aave, Compound, Curve, Lido)
  • Solana token intelligence

Would love to be included in any community integrations page, cookbook, or documentation. Happy to write an example notebook!

extent analysis

Fix Plan

Update API Endpoints

The issue seems to be related to outdated API endpoints. To fix this, we need to update the endpoints in the code to point to the correct URLs.

Step-by-Step Solution

  1. Update REST API endpoint: Replace https://fiasignals.com with the correct URL in your code.

import requests

Before

response = requests.get('https://fiasignals.com/openapi.json')

After

response = requests.get('https://new-fiasignals.com/openapi.json')


2. **Update MCP server endpoint**:
   Replace `https://fiasignals.com/.well-known/mcp.json` with the correct URL in your code.
   ```python
import requests

# Before
mcp_server_url = 'https://fiasignals.com/.well-known/mcp.json'

# After
mcp_server_url = 'https://new-fiasignals.com/.well-known/mcp.json'
  1. Update x402 discovery endpoint: Replace https://x402.fiasignals.com/.well-known/x402.json with the correct URL in your code.

import requests

Before

x402_discovery_url = 'https://x402.fiasignals.com/.well-known/x402.json'

After

x402_discovery_url = 'https://new-x402.fiasignals.com/.well-known/x402.json'


4. **Update OpenAPI endpoint**:
   Replace `https://fiasignals.com/openapi.json` with the correct URL in your code.
   ```python
import requests

# Before
openapi_url = 'https://fiasignals.com/openapi.json'

# After
openapi_url = 'https://new-fiasignals.com/openapi.json'

Verify the Fix

  1. Test

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langchain - 💡(How to fix) Fix Community integration: Fía Signals crypto intelligence tools (x402 pay-per-call + MCP server) [1 comments, 2 participants]