x402 List

x402 Protocol Service Directory

Messari

Data PAYMENT-READY

payment-ready until 2026-09-09

Institutional crypto market intelligence — AI chat trained on 30TB+ data covering 40,000+ assets. USDC on Base or Solana.

Pay from $0.25 per request in USDC on Base / Solana, settled onchain via the x402 protocol, no signup, no API key needed.

BASE URL https://api.messari.io WEBSITE https://messari.io ENDPOINTS 1 NETWORK Base / Solana ASSET USDC MEMBER SINCE 2026-01-23 MONITORED SINCE 2026-04-15

VERDICT

ranking generation 3

solid 86/100 #181 of 257 in Data by measured score

What the score read on this service: status online, 100% uptime 30d, 2212ms response p95, x402 compliance 14 of 14, $0.25 price against the category. Each of those is measured, and each is published in full below.

The score comes from our own monitoring, never from reviews, operator claims, or a language model: reliability, x402 compliance, price against the category, a deterministic risk flag, and a small on-chain traction term, weighted by ranking generation 3. It is not placement anyone can buy: the paid verify tier is reported beside it and is not one of its inputs. Every component below stays published and read-only.

It is a score inside Data, and only there: price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, which here means 257 listings, this one among them. That set is wider than the 257 the position above is counted against, because a listing we have measured too little of to rank still sits in the field the price and the speed are normalized over. The same service in a different field would read differently. The same engine answers GET /api/v1/best, and asked for a different pool (the whole directory, or another filter) it returns a different number for this service under this same ranking generation. Neither is more correct: they answer different questions, and the methodology states which is which.

Bands on the 0 to 100 measured score: strong at 93 and above, solid from 75, mixed from 55, weak below 55. Price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, so the score places a service in its own field.

ALTERNATIVES IN DATA

Other Data services in this directory, ordered by the same measured score. The figures are ours: 30-day uptime from our own probes, 30-day settlement volume read on-chain (a conservative undercount, and null where we cannot measure it, never a zero).

Ranked alternative x402 services in the same category, with band, measured score, 30-day uptime and 30-day on-chain settlement volume
SERVICE BAND SCORE UPTIME 30D VOL 30D
ThirdMade Shelf strong 99 100% ---
API Acre strong 99 99.7% ---
IPIntel.ai x402 Tools strong 99 100% ---
WebberSites x402 Data API strong 99 100% ---
glim.sh strong 99 100% ---
5 of 256 other ranked services in Data · see the whole category

ASSESSMENT

updated 6h ago

The parts the verdict above is computed from, each with its proof. Click any chip. Measured values stay read-only; unknown is honest, and an unknown is never counted as a zero.

reliability 100%
uptime 24h
100%
uptime 7d
100%
uptime 30d
100%
uptime 90d
100%
response p95
2212ms
avg response
913ms
total checks
7,422

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 $0.25 (p98 in Data)
price (min)
$0.25
category percentile (min)
p98 in Data
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 ---

This service settles on a network x402-list does not measure yet, so on-chain volume is not counted here. Shown as unmeasured, not zero.

WHAT IT DOES

ai-derived

Provides AI chat completion over crypto research data

category
crypto-ai
in
body
auth
api key
aicryptochatresearch

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 /ai/v2/chat/completions AI chat completion over crypto research data $0.25 Base/Solana USDC header
1 endpoints

REQUEST / RESPONSE EXAMPLE

An unpaid request to POST /ai/v2/chat/completions 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.messari.io/ai/v2/chat/completions'
// 402 response (captured by monitor) · 1 payload · click to expand
[
  {
    "error": "Payment Required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x75Ddd3c42eAce13c59EA0CD1141B886A1c70D2A5",
        "amount": "250000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
        },
        "payTo": "jPt2dffmPi7WEtV8J6UFHJQaatEJVyuSFmz5b4DHFG8",
        "amount": "250000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 60
      },
      {
        "asset": "0x779Ded0c9e1022225f8E0630b35a9b54bE713736",
        "extra": {
          "name": "USD₮0",
          "version": "1"
        },
        "payTo": "0xda60f4d061fc9acf3b107123f0bf44c293b328d0",
        "amount": "250000",
        "scheme": "exact",
        "network": "eip155:196",
        "maxTimeoutSeconds": 60
      }
    ],
    "resource": {
      "url": "https://api.messari.io/ai/v2/chat/completions",
      "mimeType": "application/json",
      "description": "AI chat completion"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "stream": false,
              "messages": [
                {
                  "role": "assistant",
                  "content": "You are responding to a query. Be succinct."
                },
                {
                  "role": "user",
                  "content": "What are the latest updates on Bitcoin?"
                }
              ],
              "verbosity": "succinct",
              "disable_tables": true,
              "response_format": "markdown",
              "inline_citations": false
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "example": {
              "data": {
                "messages": [
                  {
                    "role": "assistant",
                    "content": "Bitcoin recently surpassed $100,000 for the first time..."
                  }
                ]
              }
            }
          }
        },
        "schema": {
          "type": "object",
          "required": [
            "messages"
          ],
          "properties": {
            "stream": {
              "type": "boolean"
            },
            "messages": {
              "type": "array",
              "items": {
                "type": "object",
                "required": [
                  "role",
                  "content"
                ],
                "properties": {
                  "role": {
                    "enum": [
                      "user",
                      "assistant"
                    ],
                    "type": "string"
                  },
                  "content": {
                    "type": "string"
                  }
                }
              }
            },
            "verbosity": {
              "enum": [
                "succinct",
                "normal",
                "verbose"
              ],
              "type": "string"
            },
            "disable_tables": {
              "type": "boolean"
            },
            "response_format": {
              "enum": [
                "markdown",
                "text"
              ],
              "type": "string"
            },
            "inline_citations": {
              "type": "boolean"
            }
          }
        }
      }
    },
    "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/messari/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
08-04 · uptime 100.0% · 744ms avg08-05 · uptime 100.0% · 876ms avg08-06 · uptime 100.0% · 869ms avg08-07 · uptime 100.0% · 769ms avg08-08 · uptime 100.0% · 821ms avg08-09 · uptime 100.0% · 909ms avg08-10 · uptime 100.0% · 704ms avg08-11 · uptime 100.0% · 829ms avg08-12 · uptime 100.0% · 832ms avg08-13 · uptime 100.0% · 709ms avg08-14 · uptime 100.0% · 734ms avg08-15 · uptime 100.0% · 901ms avg08-16 · uptime 100.0% · 850ms avg08-17 · uptime 100.0% · 824ms avg08-18 · uptime 100.0% · 703ms avg08-19 · uptime 100.0% · 686ms avg08-20 · uptime 100.0% · 822ms avg08-21 · uptime 99.6% · 800ms avg08-22 · uptime 99.6% · 852ms avg08-23 · uptime 100.0% · 977ms avg08-24 · uptime 99.6% · 952ms avg08-25 · uptime 100.0% · 1260ms avg08-26 · uptime 100.0% · 1167ms avg08-27 · uptime 100.0% · 1348ms avg08-28 · uptime 100.0% · 1239ms avg08-29 · uptime 100.0% · 1139ms avg08-30 · uptime 100.0% · 1119ms avg08-31 · uptime 100.0% · 1151ms avg09-01 · uptime 100.0% · 1155ms avg09-02 · uptime 100.0% · 1111ms avg08-0409-02
30d UPTIME 100%
RESPONSE TIME
08-04 · 744ms avg08-04 · 744ms avg08-05 · 876ms avg08-05 · 876ms avg08-06 · 869ms avg08-06 · 869ms avg08-07 · 769ms avg08-07 · 769ms avg08-08 · 821ms avg08-08 · 821ms avg08-09 · 909ms avg08-09 · 909ms avg08-10 · 704ms avg08-10 · 704ms avg08-11 · 829ms avg08-11 · 829ms avg08-12 · 832ms avg08-12 · 832ms avg08-13 · 709ms avg08-13 · 709ms avg08-14 · 734ms avg08-14 · 734ms avg08-15 · 901ms avg08-15 · 901ms avg08-16 · 850ms avg08-16 · 850ms avg08-17 · 824ms avg08-17 · 824ms avg08-18 · 703ms avg08-18 · 703ms avg08-19 · 686ms avg08-19 · 686ms avg08-20 · 822ms avg08-20 · 822ms avg08-21 · 800ms avg08-21 · 800ms avg08-22 · 852ms avg08-22 · 852ms avg08-23 · 977ms avg08-23 · 977ms avg08-24 · 952ms avg08-24 · 952ms avg08-25 · 1260ms avg08-25 · 1260ms avg08-26 · 1167ms avg08-26 · 1167ms avg08-27 · 1348ms avg08-27 · 1348ms avg08-28 · 1239ms avg08-28 · 1239ms avg08-29 · 1139ms avg08-29 · 1139ms avg08-30 · 1119ms avg08-30 · 1119ms avg08-31 · 1151ms avg08-31 · 1151ms avg09-01 · 1155ms avg09-01 · 1155ms avg09-02 · 1111ms avg09-02 · 1111ms avg08-0409-02
AVG RESP 920ms
PRICE (captured 402, USD)
08-03 · $0.2509-02 · $0.25$0.2508-0309-02
SUB-SCORES (uptime + x402 compliance)
08-03 uptime: 100.0% compliance: 100% checks08-04 uptime: 100.0% compliance: 100% checks08-05 uptime: 100.0% compliance: 100% checks08-06 uptime: 100.0% compliance: 100% checks08-07 uptime: 100.0% compliance: 100% checks08-08 uptime: 100.0% compliance: 100% checks08-09 uptime: 100.0% compliance: 100% checks08-10 uptime: 100.0% compliance: 100% checks08-11 uptime: 100.0% compliance: 100% checks08-12 uptime: 100.0% compliance: 100% checks08-13 uptime: 100.0% compliance: 100% checks08-14 uptime: 100.0% compliance: 100% checks08-15 uptime: 100.0% compliance: 100% checks08-16 uptime: 100.0% compliance: 100% checks08-17 uptime: 100.0% compliance: 100% checks08-18 uptime: 100.0% compliance: 100% checks08-19 uptime: 100.0% compliance: 100% checks08-20 uptime: 100.0% compliance: 100% checks08-21 uptime: 100.0% compliance: 100% checks08-22 uptime: 99.9% compliance: 100% checks08-23 uptime: 100.0% compliance: 100% checks08-24 uptime: 100.0% compliance: 100% checks08-25 uptime: 100.0% compliance: 100% checks08-26 uptime: 100.0% compliance: 100% checks08-27 uptime: 100.0% compliance: 100% checks08-28 uptime: 100.0% compliance: 100% checks08-29 uptime: 100.0% compliance: 100% checks08-30 uptime: 100.0% compliance: 100% checks08-31 uptime: 100.0% compliance: 100% checks09-01 uptime: 100.0% compliance: 100% checks09-02 uptime: 100.0% compliance: 100% checksuptimecompliance08-0309-02

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

PILLARS OVER TIME (measured)

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)
This service settles on a network x402-list does not measure yet, so on-chain volume is not counted here. Shown as unmeasured, not zero.
DISTINCT BUYERS
This service settles on a network x402-list does not measure yet, so distinct on-chain buyers are not counted here. Shown as unmeasured, not zero.

COMPLIANCE

14/14 checks pass · grade A

last 402 captured 2026-07-20 · last up 2026-09-02

  • 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
● OK 614ms
● SLOW 1784ms
● OK 1227ms
● OK 767ms
● OK 1195ms
● OK 969ms
● SLOW 5353ms
● OK 888ms
● OK 503ms
● SLOW 1940ms
● OK 690ms
● SLOW 1527ms
● OK 670ms
● OK 1290ms
● SLOW 2579ms
● OK 948ms
● OK 408ms
● OK 261ms

EMBED THIS BADGE

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

Messari listed on x402-list
status
Messari uptime on x402-list
live uptime
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// HTML · live uptime variant
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</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/messari/update.