# api.pdata.world — search and data APIs — 0 of 5

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> Probe-verified (tier 2 of 3). Last checked 2026-09-26. 0 of 5 capability checks passed. 2 unknown.

- host: api.pdata.world
- url: https://api.pdata.world/
- category: search and data APIs
- type: other

## Probe-verified · tier 2 of 3

Probed live on 2026-09-26 against rubric v1.2. 0 of 5 checks passed. 2 unknown.

- UNKNOWN — Markdown negotiation (`Accept: text/markdown`)
- UNKNOWN — Markdown twin at a predictable URL (`/page.md`)
- FAIL — llms.txt (`/llms.txt`)
- FAIL — API catalog (`RFC 9727`)
- FAIL — MCP endpoint answers tools/list (`initialize → tools/list, no credentials`)
  - DEAD — MCP server card (`/.well-known/mcp/server-card.json`): dead; points at a server that did not answer; not scored
  - Platform-supplied: not applicable — no MCP endpoint answered; not scored
- FAIL — 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

## Summary

Live prediction-market data streams from eight platforms including Polymarket, Kalshi, and Manifold, accessible via a read-only API without authentication.

## Context

105 sites in this index share the category "search and data APIs"; 20 are transactional.

## How we grade

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

## About this record

Known Good probes sites live and publishes what was tested and when.
Method: https://knowngood.sh/about.md · Rubric: https://knowngood.sh/benchmark

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](https://knowngood.sh/bot)

## Where this sits

- other: https://knowngood.sh/type/other
- search and data APIs: https://knowngood.sh/category/search-data-apis
- Browse: https://knowngood.sh/browse
- Rubric: https://knowngood.sh/benchmark