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x402stock

x402stock.vercel.app · visit site →

Probe-verified · tier 2 · checked 26 Sep 2026

Pay-per-call API providing US stocks, ETFs, options, forex, crypto, energy commodities, US and global macroeconomic data, SEC filings, congressional trades, and market sentiment for AI agents, payable in USDC via x402 on Base blockchain.

financial servicesfinancial-services

What we tested

Probed live on 26 Sep 2026 against rubric v1.2. 2 of 5 checks passed. 3 unknown.

PROBE-VERIFIEDtier 2 of 3
?Markdown negotiationAccept: text/markdown · unknown
?Markdown twin at a predictable URL/page.md · unknown
✓llms.txt/llms.txt
✓API catalogRFC 9727
?MCP endpoint answers tools/list
MCP not reachable
initialize → tools/list, no credentials · could not ask
—MCP server card
/.well-known/mcp/server-card.json · absent
not scored
—Platform-supplied
not applicable — no MCP endpoint answered
not scored
—Other agent files at well-known paths
agent-skills/index.json · oauth-authorization-server · oauth-protected-resource · http-message-signatures-directory · none found
not scored

Context

908 sites in the index share the category financial services. 167 transactional sites share it.

How we grade

Three tiers. Every listing shows which one it has reached, and when. The rubric.

tier 1
Declared
The site says agents are welcome in its robots.txt. A permission, not a capability.
✓
tier 2
Probe-verified
We fetched the site and tested each signal ourselves. Dated, repeatable, re-checked on a schedule.
this site · 26 Sep 2026
tier 3
Behaviourally verified
An agent completed the action end to end — booked, bought, submitted — and it worked.
coming
Own this site?

Behavioural verification — an agent completing your key actions end to end, with the date published here — opens to a small founding cohort first. Leave an email to be in it.

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Record generated from a live database query. Method: about the index.

How we found this site: probe discovery. This site didn’t declare agent access — we found it by checking the open web. Everything above was tested the same way, against the same rubric, on the date shown. How we choose what to check, and how to opt out →

Where this sits
More saas financial services Browse the index How we grade