# Quantral

> Quantral tracks what investors, insiders and politicians say and do about stocks, scores the sentiment per company, and grades each source by its verified track record. Sentiment data, not investment advice.

## MCP server

- [MCP endpoint](https://app.quantral.com/api/mcp): Streamable HTTP. People connect with OAuth from Claude, ChatGPT and other clients.
- [Setup instructions](https://app.quantral.com/connect)

## For autonomous agents

- [Free sample](https://app.quantral.com/api/agent/sample): the same fixed sample for every caller, with today's top signals and one real output of most MCP tools for NVDA. No key needed.
- [Agent pass](https://app.quantral.com/api/agent/pass): POST to get an x402 402 challenge, pay in USDC on Base, and receive an API key for the MCP endpoint. Send it as `Authorization: Bearer <key>`.
- Payment: x402 v2, `exact` scheme. Sign an EIP-3009 `transferWithAuthorization` for the exact amount and send it in the `PAYMENT-SIGNATURE` header. The payment service submits it and pays the gas, so the wallet needs USDC only, no ETH.
- Plan `month`: 14.99 USDC for 30 days, POST https://app.quantral.com/api/agent/pass?plan=month
- Plan `week`: 5.99 USDC for 7 days, POST https://app.quantral.com/api/agent/pass?plan=week
- Paid request body: `{"country": "<ISO 3166-1 alpha-2>", "acceptTerms": true, "termsVersion": "2026-11"}`.
- Optional `email` in the paid body: the receipt is emailed there once the payment settles. Every purchase response also carries `receiptUrl`, a permanent receipt page that needs no key.
- Renew by paying again from the same wallet, either plan: days are added to the current end. Purchases are refused while more than 60 days remain. Payments are final.
- Check a pass with GET https://app.quantral.com/api/agent/pass and your key. Key management at https://app.quantral.com/api/agent/key with your key as the bearer: POST issues a new key and ends the old one, DELETE revokes it (there is no GET).
- The agent pass has no free trial; the free sample is the way to evaluate it. The 7-day trial on https://app.quantral.com/pricing is the separate subscription for people using the web and mobile apps.
- [Terms](https://quantral.com/terms/agent-pass)
- [OpenAPI](https://app.quantral.com/api/agent/openapi.json)
- [x402 discovery document](https://app.quantral.com/.well-known/x402)