Every API here is available over the APIs.io API and to AI agents over MCP.
MCP server
One button, every client — Claude, Cursor, VS Code and the rest.
https://apis.io/mcp
Tools for apis
7 MCP tools reach this
find_apisBrowse and filter every API in the catalog.
get_api_artifactsOne API's artifacts, grouped by type.
get_openapiThe primary OpenAPI for this API.
find_similar_apisAPIs that look like this one.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.
All 92 tools →
Call it yourself
curl for this page
This API
curl "https://apis.io/api/v1/apis/prereason-com:prereason-com-short-urls-api"
All apis
curl "https://apis.io/api/v1/apis?limit=25"
Discovery needs no key. Ratings and market analysis are Pro.
Get an API key
Free tier, no form to fill in. Signing in shares your email address with us — we
store it to create your key and to recognise you if you sign in with another
provider. See our Privacy Policy and
Terms.
A second provider on the same verified email joins the account you already have.
openapi: 3.2.0
info:
title: PreReason Short URLs API
version: 1.0.0
description: 'Financial market data for AI agents, paid per request with no API key (x402
or MPP, USDC on Base) or read with a key: economic indicators, Treasury
yields and rates, FX, commodities, listed companies'' financial statements
and Bitcoin, each served as a briefing with the interpretation done.
PreReason returns market briefings with the interpretation already done:
trends, regime classification and confidence scores. Markdown by default,
which costs about
40 percent fewer tokens than JSON. Add ?format=json for structured output.
Coverage is macro, rates, bonds, FX, commodities, listed companies and
Bitcoin: the Fed balance sheet, M2, net liquidity, Treasury yields and
auctions, the dollar, oil and gas inventories, metals and grains, company
briefings, Bitcoin price, network and ETF flows, and cross asset
correlations.
GET /api/briefings is the live catalogue, with the tier each briefing
needs, and GET /api/metrics lists the individual series. Neither needs a key.
Not every endpoint needs one. Each operation below declares its own rule,
and the catalogue endpoints, the health and status endpoints and POST
/api/mcp are open. A briefing needs either an API key, sent as
Authorization: Bearer or X-API-Key, or a payment for that single call:
request a priced endpoint without a key and the 402 quotes both x402 and
MPP, USDC on Base. Free keys at https://www.prereason.com/signup, and an
agent with no browser of its own can earn one through the claim flow at
https://www.prereason.com/auth.md. Full reference at
https://www.prereason.com/docs.
Briefings are built from these providers'' data: Federal Reserve Bank of
New York, Board of Governors of the Federal Reserve System, U.S. Department
of the Treasury, Treasury International Capital (TIC), U.S. Treasury Fiscal
Data, CFTC, EIA, BIS, SEC EDGAR, FRED, mempool.space and CoinGecko, and 24
more, each named with every value it supplies (every provider is listed at
https://www.prereason.com/data-sources). Freshness ranges from near real
time to monthly depending on the series, and ETF market data updates every
15 minutes during market hours. Powered by CoinGecko. This product uses the
FRED API but is not endorsed or certified by the
Federal Reserve Bank of St. Louis.'
contact:
name: API Support
url: https://www.prereason.com/docs
email: support@prereason.com
license:
name: MIT
url: https://opensource.org/licenses/MIT
x-guidance: 'Pay per request with no account. Call a priced GET endpoint and read the 402: it offers MPP (WWW-Authenticate: Payment, method evm, USDC on Base) and x402 (PAYMENT-REQUIRED, USDC on Base or Solana). Pay with either and retry the same request carrying the credential. With an API key (X-API-Key) the same endpoints are served under your plan instead. Start with GET /api/btc ($0.02) for a Bitcoin briefing; /api/macro, /api/cross/regime and /api/fx cover macro, market regime and FX liquidity. Responses are markdown by default; add ?format=json for structured output.'
servers:
- url: https://api.prereason.com
description: Production API
security:
- BearerAuth: []
tags:
# --- truncated at 32 KB (55 KB total) ---
# Full source: https://artifacts.apis.io/prereason-com/openapi/prereason-com-short-urls-api-openapi.yml