●

Exa

AI PAYMENT-READY

payment-ready until 2026-08-20

AI-native semantic/neural web search API. Pay-per-query via x402 for agents without API keys.

Pay from $0.007 per request in USDC on Base / Solana, settled onchain via the x402 protocol, no signup, no API key needed.

first settlement 2026-03-27 · $619.47 all-time · settled via coinbase

BASE URL https://api.exa.ai │ WEBSITE https://exa.ai │ ENDPOINTS 1 │ NETWORK Base / Solana │ ASSET USDC │ MEMBER SINCE 2026-01-20 │ MONITORED SINCE 2026-04-15

ASSESSMENT

updated 3h ago

Evidence-backed signals, not a single score. Click any chip for the proof. Measured values stay read-only; unknown is honest.

reliability 100%

uptime 24h: 100%
uptime 7d: 100%
uptime 30d: 100%
uptime 90d: 100%
response p95: 1156ms
avg response: 720ms
total checks: 7,305

Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.

compliance A (14/14)

14 of 14 x402 conformance checks pass. Full checklist below.

jump to compliance checklist

price $0.007 (p34 in AI)

price (min): $0.007
category percentile (min): p34 in AI
endpoints / prices: 1 / 1
model: flat
stability: 100%

risk clean

No deterministic risk flag. Risk fires only on an exact blocklist match, or a reserved-brand name with a mismatched verified payTo. Never from low uptime, a high price, or a model guess.

domain age: -
registrar: -
hosting: custom
domain created: ---

Identity facts, not a risk score.

traction $39.457 30d · 153 buyers

volume 30d: $39.457
buyers 30d: 153
settlements 30d: 5,922
first settlement: 2026-03-27
last settlement: 2026-08-13
top buyer share: 15% of 30d volume
trend 7d vs 30d: 0.96x the 30d daily rate
networks: eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdpKuc147dw2N9d
volume all-time: $619.47
settlements all-time: 89,020
median settlement 30d: $0.007
max settlement 30d: $0.022
settled via: coinbase ($39.46, 5,922 tx)

Conservative undercount: only USDC settlements via facilitators we measure are counted. A measured floor, not an estimate.

Top buyer share is a concentration signal, not part of the ranking score.

CHANGES

10 events, detecting since 2026-07-24

Payout, price, and schema changes detected on this service's x402 wire. A payout rotation at an unchanged price shows up here even when nothing else moves. Full feed at /changes.

changes schema changed 1h ago (10 since 2026-07-24)

schema changed · 1h ago

schema removed POST /search exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60 {"acceptId":"solana-usdc-mainnet","breakdown":{"search":0.006999999999999999},"feePayer":"BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F","name":"USD Coin","totalUsd":0.006999999999999999,"version":"2"}

schema added POST /search exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60 {"acceptId":"solana-usdc-mainnet","breakdown":{"search":0.006999999999999999},"feePayer":"Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88","name":"USD Coin","totalUsd":0.006999999999999999,"version":"2"}

schema changed · 1h ago

schema removed POST /search exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60 {"acceptId":"solana-usdc-mainnet","breakdown":{"search":0.006999999999999999},"feePayer":"GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb","name":"USD Coin","totalUsd":0.006999999999999999,"version":"2"}

schema added POST /search exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60 {"acceptId":"solana-usdc-mainnet","breakdown":{"search":0.006999999999999999},"feePayer":"BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F","name":"USD Coin","totalUsd":0.006999999999999999,"version":"2"}

schema changed · 2h ago

schema added POST /search exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60 {"acceptId":"solana-usdc-mainnet","breakdown":{"search":0.006999999999999999},"feePayer":"GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb","name":"USD Coin","totalUsd":0.006999999999999999,"version":"2"}

schema changed · 2h ago

schema removed POST /search exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60 {"acceptId":"solana-usdc-mainnet","breakdown":{"search":0.006999999999999999},"feePayer":"Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88","name":"USD Coin","totalUsd":0.006999999999999999,"version":"2"}

schema added POST /search exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60 {"acceptId":"solana-usdc-mainnet","breakdown":{"search":0.006999999999999999},"feePayer":"BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F","name":"USD Coin","totalUsd":0.006999999999999999,"version":"2"}

schema changed · 3h ago

schema removed POST /search exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60 {"acceptId":"solana-usdc-mainnet","breakdown":{"search":0.006999999999999999},"feePayer":"BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP","name":"USD Coin","totalUsd":0.006999999999999999,"version":"2"}

schema changed · 3h ago

schema added POST /search exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60 {"acceptId":"solana-usdc-mainnet","breakdown":{"search":0.006999999999999999},"feePayer":"BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP","name":"USD Coin","totalUsd":0.006999999999999999,"version":"2"}

schema changed · 3h ago

schema removed POST /search exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60 {"acceptId":"solana-usdc-mainnet","breakdown":{"search":0.006999999999999999},"feePayer":"GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb","name":"USD Coin","totalUsd":0.006999999999999999,"version":"2"}

schema added POST /search exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60 {"acceptId":"solana-usdc-mainnet","breakdown":{"search":0.006999999999999999},"feePayer":"BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F","name":"USD Coin","totalUsd":0.006999999999999999,"version":"2"}

schema changed · 4h ago

schema removed POST /search exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60 {"acceptId":"solana-usdc-mainnet","breakdown":{"search":0.006999999999999999},"feePayer":"Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88","name":"USD Coin","totalUsd":0.006999999999999999,"version":"2"}

schema added POST /search exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60 {"acceptId":"solana-usdc-mainnet","breakdown":{"search":0.006999999999999999},"feePayer":"GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb","name":"USD Coin","totalUsd":0.006999999999999999,"version":"2"}

schema changed · 4h ago

schema removed POST /search exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60 {"acceptId":"solana-usdc-mainnet","breakdown":{"search":0.006999999999999999},"feePayer":"BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP","name":"USD Coin","totalUsd":0.006999999999999999,"version":"2"}

schema changed · 4h ago

schema removed POST /search exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60 {"acceptId":"solana-usdc-mainnet","breakdown":{"search":0.006999999999999999},"feePayer":"D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM","name":"USD Coin","totalUsd":0.006999999999999999,"version":"2"}

schema added POST /search exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 60 {"acceptId":"solana-usdc-mainnet","breakdown":{"search":0.006999999999999999},"feePayer":"BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP","name":"USD Coin","totalUsd":0.006999999999999999,"version":"2"}

see all changes for this service

WHAT IT DOES

ai-derived

Provides AI-powered web search and content retrieval services

category: ai-search
in: body
auth: api key

web-searchaicontent-retrievalsemantic-search

AI-generated summary. The measured data is never altered by it.

ENDPOINTS

Service endpoints with HTTP method, path, description, pricing, and network
METHOD	PATH	DESCRIPTION	PRICE	NETWORK	ASSET	402 CHANNEL
POST	/search	Semantic/neural web search	$0.007	Base/Solana	USDC	header

1 endpoints

REQUEST / RESPONSE EXAMPLE

An unpaid request to POST /search returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.

// request

curl -i -X POST 'https://api.exa.ai/search'

// 402 response (captured by monitor) · 1 payload · click to expand

[
  {
    "error": "Payment required to access this resource",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2",
          "acceptId": "legacy",
          "totalUsd": 0.006999999999999999,
          "breakdown": {
            "search": 0.006999999999999999
          }
        },
        "payTo": "0x6d6E695b09861467c7d462f5AAF31cF3540B9192",
        "amount": "7000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "name": "USD Coin",
          "version": "2",
          "acceptId": "solana-usdc-mainnet",
          "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88",
          "totalUsd": 0.006999999999999999,
          "breakdown": {
            "search": 0.006999999999999999
          }
        },
        "payTo": "12Ec2cJmfR1C9uwejzxcuMhUgEC7wDrLgm1wBvvR5w9E",
        "amount": "7000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 60
      }
    ],
    "resource": {
      "url": "https://api.exa.ai/search",
      "mimeType": "application/json",
      "description": "Exa /search endpoint"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "type": "auto",
              "query": "example search query",
              "numResults": 10
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "json",
            "example": {
              "results": [
                {
                  "url": "https://example.com",
                  "score": 0.99,
                  "title": "Example"
                }
              ]
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "bodyType",
                "body",
                "method"
              ],
              "properties": {
                "body": {
                  "type": "object",
                  "required": [
                    "query"
                  ],
                  "properties": {
                    "type": {
                      "type": "string",
                      "description": "Search type: auto, keyword, neural, deep-lite, deep, deep-reasoning"
                    },
                    "query": {
                      "type": "string",
                      "description": "Search query"
                    },
                    "contents": {
                      "type": "object",
                      "description": "Content fields to include: text, highlights, summary"
                    },
                    "numResults": {
                      "type": "number",
                      "description": "Number of results to return (max 10 for x402)"
                    }
                  }
                },
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        }
      },
      "agentkit": {
        "info": {
          "uri": "https://api.exa.ai/search",
          "nonce": "b9d4fa604b66cef23eb16974971c0b7d",
          "domain": "api.exa.ai",
          "version": "1",
          "issuedAt": "2026-08-13T14:21:00.634Z",
          "resources": [
            "https://api.exa.ai/search"
          ],
          "statement": "Verify your agent is backed by a real human to access Exa"
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "domain",
            "address",
            "uri",
            "version",
            "chainId",
            "type",
            "nonce",
            "issuedAt",
            "signature"
          ],
          "properties": {
            "uri": {
              "type": "string",
              "format": "uri"
            },
            "type": {
              "type": "string"
            },
            "nonce": {
              "type": "string"
            },
            "domain": {
              "type": "string"
            },
            "address": {
              "type": "string"
            },
            "chainId": {
              "type": "string"
            },
            "version": {
              "type": "string"
            },
            "issuedAt": {
              "type": "string",
              "format": "date-time"
            },
            "notBefore": {
              "type": "string",
              "format": "date-time"
            },
            "requestId": {
              "type": "string"
            },
            "resources": {
              "type": "array",
              "items": {
                "type": "string",
                "format": "uri"
              }
            },
            "signature": {
              "type": "string"
            },
            "statement": {
              "type": "string"
            },
            "expirationTime": {
              "type": "string",
              "format": "date-time"
            }
          }
        },
        "_options": {
          "mode": {
            "type": "free-trial",
            "uses": 100
          },
          "network": "eip155:480",
          "statement": "Verify your agent is backed by a real human to access Exa"
        },
        "supportedChains": [
          {
            "type": "eip191",
            "chainId": "eip155:480"
          },
          {
            "type": "eip1271",
            "chainId": "eip155:480"
          }
        ]
      }
    },
    "x402Version": 2
  }
]

OVER TIME

All charts use the 30d selector; each series spans only the dates it has data for. Every series is also served as JSON at /api/v1/services/exa/price, /scores, /volume and /buyers. On-chain volume and distinct buyers are measured over the service's settlement address and are a conservative undercount (only settlements that reach a measured facilitator are counted). The on-chain series roll up hourly, so the latest day can be up to about an hour behind; distinct buyers are counted per payout address, so a service that settles to more than one address is an upper bound.

UPTIME

30d UPTIME 100%

RESPONSE TIME

AVG RESP 719ms

PRICE (captured 402, USD)

SUB-SCORES (uptime + x402 compliance)

checklist grew 11->14 on 2026-07-28; a step here is a metric change, not a regression

PILLARS OVER TIME (measured)

price percentile in AI

site signals present (of 6)

Measured site and economics pillars from the assessment history, so the latest value shown elsewhere on this page reads as a point on a trend rather than a permanent state.

VOLUME (on-chain settlement, USD)

DISTINCT BUYERS

COMPLIANCE

14/14 checks pass · grade A

last 402 captured 2026-08-13 · last up 2026-08-13

402 payload captured
accepts[] array present
payTo address recoverable
payTo at accepts[0].payTo (conformant shape)
payTo is a valid on-chain address
atomic price declared
atomic price in a sane range
asset (token) address declared
network resolves to CAIP-2
payment scheme declared
served over HTTPS
declares the current x402 version (2)
EIP-712 domain parameters present on every EVM entry
x402 v2 envelope delivered in the payment-required header

SITE PILLARS

homepage reachable
openapi doc
pricing page
llms.txt
robots.txt
terms page

recent checks (18) live · click to expand

TIME STATUS RESP CAUSE

15:21:00 UTC ● OK 678ms

15:15:00 UTC ● OK 781ms

15:09:00 UTC ● OK 363ms

15:03:00 UTC ● OK 408ms

14:57:00 UTC ● OK 834ms

14:51:00 UTC ● OK 373ms

14:45:01 UTC ● OK 1028ms

14:39:01 UTC ● SLOW 1170ms

14:33:00 UTC ● OK 559ms

14:27:00 UTC ● OK 597ms

14:21:00 UTC ● OK 649ms

14:15:00 UTC ● OK 772ms

14:09:00 UTC ● OK 490ms

14:03:00 UTC ● OK 710ms

13:57:00 UTC ● OK 297ms

13:51:00 UTC ● OK 289ms

13:45:00 UTC ● OK 749ms

13:39:00 UTC ● OK 447ms

EMBED THIS BADGE

Show that Exa is monitored on x402-list. Paste this on your site or README, it links back to this live listing.

status

// HTML

<a href="https://x402-list.com/services/exa?utm_source=badge&utm_medium=referral&utm_campaign=embed">
  <img src="https://x402-list.com/badge/exa.svg" alt="Exa listed on x402-list" height="28">
</a>

// Markdown

[![Exa on x402-list](https://x402-list.com/badge/exa.svg)](https://x402-list.com/services/exa?utm_source=badge&utm_medium=referral&utm_campaign=embed)

// HTML · live uptime variant

<a href="https://x402-list.com/services/exa?utm_source=badge&utm_medium=referral&utm_campaign=embed">
  <img src="https://x402-list.com/badge/exa.svg?data=uptime" alt="Exa uptime on x402-list" height="28">
</a>

RUN THIS SERVICE?

Keep this listing accurate: propose changes to the name, description, website, category or add new endpoints to monitor. Ownership is verified with a domain proof and every change is reviewed manually; measured data stays read-only.

[ update this listing ]

Earn the verified tier: x402list pays a real call to this endpoint and, if it delivers, the service is delivery-verified. The fee covers the cost of the probe, not the badge; there is no refund if the call does not deliver. Agent and API only, no in-browser signing. See /api.

[ verify this service ($0.25) ]

To request delisting, email info@x402-list.com or update your listing at /services/exa/update.