Discover / x402stock.vercel.app

x402stock.vercel.app

■ Challenge detected

Reference list of US equity exchanges and market centers with names, MICs, operating MICs, and SIP participant IDs. From x402stock, a pay-per-call market & economic data API for AI agents. No API key or account; pay in USDC via x402.

Listed price
$0.01
Challenge detected
10 of the last 10 checks
Median response
147 ms
Last checked
17 Oct, 08:59 UTC
In our index since
26 Sept 2026

Endpoint

curl -i https://x402stock.vercel.app/api/v1/exchanges
# 402 Payment Required: pay with an x402 client (USDC on Base),
# then send the same request again with the payment attached.
5 listed endpoints · on x402 Bazaar

Checks and payment terms on this page refer to the endpoint above. Other listed endpoints have not been checked individually.

Base URLhttps://x402stock.vercel.app/api/v1

  • GET/treasury-yields$0.01The daily US Treasury par yield curve (Constant Maturity Treasury rates) for every maturity from 1 month to 30 years, in percent. Defaults to the latest published day; pass `?limit=` for more recent days (max 250) and `?year=YYYY`. No ticker needed. Use for the risk-free rate, rate-sensitivity context, and yield-curve inversion in macro-aware analysis. From x402stock
  • GET/filing-search$0.02Full-text search across every SEC EDGAR filing since 2001. Find filings mentioning a keyword or exact phrase via ?q=, narrow by ?forms=10-K,8-K, ?ticker=, and ?startdt=/?enddt= dates, and cap with ?limit=. Returns each match's form, filer, date, and a link to the document. Sourced from SEC EDGAR. From x402stock, a market & economic data API (x402, USDC).
  • GET/national-debt$0.01The total US public debt outstanding to the penny — the headline national-debt figure — split into debt held by the public and intragovernmental holdings, with the latest value, prior business day, day-over-day change, and recent history. No ticker needed. Updates each business day. Sourced from the US Treasury (FiscalData). Pass `?limit=` for more history (default 30, max 250). From x402stock
  • GET/exchanges$0.01Reference list of US equity exchanges and market centers with names, MICs, operating MICs, and SIP participant IDs. From x402stock, a pay-per-call market & economic data API for AI agents. No API key or account; pay in USDC via x402.
  • GET/conditions$0.01Reference catalog of trade/quote condition codes (the numeric `conditions` seen on trades) with names, types, data types, and SIP mappings. From x402stock, a pay-per-call market & economic data API for AI agents. No API key or account; pay in USDC via x402.

A dash means the listing gives no price or method. Copy buttons copy the full URL.

Showing 5 of 5 listed endpoints.

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/x402stock.vercel.app

Recent checks

30 Sept 2026One bar per check, showing up to 20 recent checks. Coloured bars show relative response time, with a minimum visible height; full-height grey bars mean no challenge was detected. “Challenge detected” means HTTP 402 or another detected payment-challenge signal.17 Oct 2026
All 10 checks
When (UTC)ResultHTTPResponse
17 Oct, 08:59 UTCChallenge detected402246ms
16 Oct, 08:13 UTCChallenge detected402241ms
14 Oct, 23:56 UTCChallenge detected402141ms
13 Oct, 20:45 UTCChallenge detected402171ms
11 Oct, 19:34 UTCChallenge detected402207ms
10 Oct, 03:32 UTCChallenge detected402152ms
9 Oct, 00:47 UTCChallenge detected402131ms
7 Oct, 21:31 UTCChallenge detected402129ms
6 Oct, 16:01 UTCChallenge detected402142ms
30 Sept, 05:03 UTCChallenge detected402134ms

Questions

Did our last probe detect a payment challenge?

At our last probe on 17 Oct, 08:59 UTC, it returned HTTP 402 or another detected payment-challenge signal. This check did not test payment, delivery or compatibility with the Superstables client.

What price is recorded for x402stock.vercel.app?

Its listed price is $0.01.

What payment terms does x402stock.vercel.app advertise?

The listing advertises x402, Base and USDC. It names cdp as its facilitator. Check the seller's current payment challenge and authentication requirements before paying.

Where is x402stock.vercel.app listed?

In x402 Bazaar. Superstables first indexed it on 26 Sept 2026.

Something wrong on this page? Tell us.