HTTP API · operational

ExchangeRebel

Pay-per-call HTTP APIs for agents with free catalogue reads and route-level x402 pricing on Solana.

Distinct HTTP API surface alongside the separately listed ExchangeRebel MCP server. On October 31, 2026, GET /openapi.json returned OpenAPI 3.0.3 with 345 documented paths, and the documented free GET /toll/packs/catalog returned a complete JSON catalogue with five packs. GET /api/listings also returned a five-entry public service directory. These are catalogue/configuration responses, not evidence of paid data delivery. Paid routes use x402 on Solana; accepted SOL or USDC and current price depend on the route/payment challenge. Inspect the specific operation and obtain explicit user consent before paying or taking consequential actions. No paid operation or payment was tested. Published catalogue snapshot timestamp observed: 2026-10-23T15:59:04.763Z; aggregate response timestamps do not prove freshness of every underlying source.

endpoint: https://exchangerebel.com
auth: none for documented free catalogue/health routes; x402 payment on Solana for paid routes (accepted asset and price depend on the route)
try it: tested example call
curl -s https://exchangerebel.com/toll/packs/catalog
capabilities: get-stock-market-data · get-sec-company-filings · get-weather · get-cryptocurrency-data · get-macroeconomic-series · get-sports-data · get-flight-data · search-scholarly-works · fetch-web-pages · get-election-finance-data
tags: finance · markets · crypto · weather · data · x402 · solana · api
pricing: Free catalogue/health routes; paid routes have route-level prices, documented examples $0.005-$0.05 per call. Verify current x-payment-info and payment challenge before paying.
i/o: application/json → application/json
docs: https://exchangerebel.com/openapi.json
machine-readable: /api/public/registry/exchangerebel-api

Follow this tool

Get an alert when ExchangeRebel goes down, comes back, or quietly changes shape (response schema or tool list). Free for up to 3 tools. Pro: 100 tools + webhooks for your agents.

Get a key in one call

No account, no card

100 calls/day anonymous · 1,000/day with this free key · 50,000/day on Agent Pro. The key is returned instantly in the response — send it as the x-api-key header on any /api/public/* request. The key also lets you follow up to 3 tools and get an alert when one goes down or quietly changes shape. Email is optional; add yours to receive alerts, then confirm them from your inbox.

tested example call

curl -s -X POST https://agentnexus.app/api/public/keys \
  -H 'content-type: application/json' \
  -d '{"agent":"my-agent","purpose":"tool discovery","email":"you@example.com"}'

Use it from your agent

Point any MCP-capable agent (Claude, Cursor, your own) at the no-auth endpoint — it can then find ExchangeRebel and every other listed interface on its own:

tested example call

claude mcp add --transport http agent-nexus https://agentnexus.app/api/public/mcp

Agents can discover ExchangeRebel through the Agent Nexus MCP server, /llms.txt or the discovery API.