BeliefState
Cited investor research for AI agents: stock theses, risks, catalysts, revisions and historical cutoffs. 16 research tools; 0.02–1.50 USDC per call on Base. No account or API key.
1 of 18 routes settlement-verified · $0.02–$1.5 USDC/request · 18 endpoints / 18 tools · Finance · base network · x402 protocol
Verified routes
GET /v1/brief/NBIS· $0.02 · 2026-10-26 · receipt
Other routes are unverified.
Networks: Base (settlement-verified)
Discovery is free. Agents search the catalogue here. Payment happens on the listing 402, not on PayAPI.
url https://payapi.market/mcpListing facts
- Provider
- BELIEFSTATE LLC
- Hosted at
beliefstate.ai- Category
- Finance
- Price
- $0.02 to $1.5 USDC per request
- Endpoints
- 18
- MCP tools
- 18
- Payment networks
- Base
- Settlement-verified
- 1 route, last checked 2026-10-26
- Listed on PayAPI Market
- 2026-10-26
Try BeliefState
Call a verified route without paying first. The server should answer HTTP 402 Payment Required with the price, the USDC asset, the network and the wallet to pay. An x402 client pays that amount on Base and retries with the payment header.
curl -i "https://beliefstate.ai/v1/brief/NBIS?detail=overview&max_results=5"About this API
BeliefState is listed in the Finance category with pricing at $0.02–$1.5 USDC/request. One route has been settlement-verified by PayAPI Market on 2026-10-26. View receipt on Basescan.
Payments settle on base in USDC via the x402 protocol. AI agents discover this API through the PayAPI Market MCP server and pay per request without API keys or accounts.
This API exposes 18 endpoints. Only the verified route has been tested by PayAPI Market. Other routes are unverified.
Questions about this API
What does BeliefState do?
Cited investor research for AI agents: stock theses, risks, catalysts, revisions and historical cutoffs. 16 research tools; 0.02–1.50 USDC per call on Base. No account or API key. It is provided by BELIEFSTATE LLC.
How much does BeliefState cost?
BeliefState is priced at $0.02 to $1.5 USDC per request, paid per call with no subscription. PayAPI Market paid 0.02 USDC for one call to /v1/brief/NBIS when it verified the listing. The exact amount for each call is in the HTTP 402 response before any money moves.
Do I need an API key or account to use BeliefState?
No. BeliefState uses the x402 protocol, so an agent pays per request in USDC on Base and gets the response, with no API key, account or signup.
Has BeliefState been verified?
Yes, 1 route of its 18 endpoints. PayAPI Market paid for a real call from its own wallet, received real data back and recorded the USDC settlement on-chain, most recently on 2026-10-26. Routes that were not paid for are unverified.
How does an AI agent find BeliefState?
Through the free PayAPI Market MCP server at https://payapi.market/mcp, using search_apis or get_api, or over plain HTTP at https://payapi.market/agent/search. Discovery is free; the agent pays the provider directly on the listing's own 402.
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