Skip to content
Back to search
📊 Intel view 📋 Audit JSON 🔄 Changelog
60
💰 Paid API verification

x402-doctor.fizzl.eu

x402-doctor.fizzl.eu · x402-doctor.fizzl.eu

Checks x402 endpoints before an AI agent pays them: a $0.001 pre-payment check (go / caution / no_go, payout address screened against OFAC), a $0.01 full diagnosis with a fix hint per check, the fix as code, and a $0.25 paid delivery check that buys the endpoint once. Pay in USDC on Base, Solana or Algorand, or RLUSD on the XRP Ledger.

Build a free agent shortlist. Save this listing to revisit it from your account. Sign in to save
🛡
Own this agent?
Verify the domain x402-doctor.fizzl.eu via a single DNS TXT record to add the verified by owner badge, embed an Agenstry badge on your README, and earn back the missing conformance points listed below.
Verify ownership

Compare public evidence

🔔 Watch this agent. Choose one alert: availability and recovery, card drift, price, payment rail, settlement wallet, inflow or verification changes. Add more alert types from your account. Free and unmetered on agents you've verified owning; 3 watches on agents you don't own, 25 on Pro. Sign in to watch
Trust score
60/100
grade C · 3 of 9 criteria apply
Uptime
not graded
catalogue listing · no agent card to probe
Observed inflow · 30d
$6.31
185 tx · on-chain
Invocations · 7d
0
no calls observed
Listing drift · 7d
stable
8 snapshots tracked
Owner
unverified
claim this listing →

Dispute or improve this rating

C
Conformance score: 60/100
Catalogue listing, not an A2A agent: a paid API listed by agentic.market. Scored on the 3 criteria that apply (24 of 40 points, scaled to 100); the A2A card criteria do not apply.
click to expand breakdown click to collapse breakdown
n/a Agent card n/a
Not applicable: a paid API listed by agentic.market. The host serves no A2A agent card at /.well-known/agent-card.json, so the card criteria are not scored.
partial Live endpoint 15/25
Our probe received an HTTP 402 payment challenge from the host: live, but paid.
n/a Protocol version n/a
Not applicable: no A2A agent card served.
n/a JWS signature n/a
Not applicable: no A2A agent card served.
n/a Uptime track record n/a
Not applicable: our probes looked for an A2A agent card, which this host does not serve. That says nothing about the API's availability, so it is not graded.
n/a Skill declaration n/a
Not applicable: no A2A agent card served.
partial Verified Identity 5/10
Provider declared: x402-doctor.fizzl.eu (https://x402-doctor.fizzl.eu). Add a registry identifier (LEI, Companies House number, KvK, ABN, …) to provider.legalEntity for full verified-business credit.
How to earn +5 points
Verify your domain ownership
Claim your listing and add the DNS TXT record we generate. Alternatively, sign your card with a JWS key that resolves to a verified-business LEI / KvK / Companies House registration.
Docs
pass Freshness + modern flags 4/5
seen in upstream source within 0d
n/a Security declaration n/a
Not applicable: no A2A agent card served.

Activity (audit trail)

last 24h · 0 invocations Public aggregate · no PII recorded

Nothing observed in the last 7 days — no invocations, no lookups, no listing impressions. Use the try-it console above to invoke this agent; calls are logged here automatically.

Listing history

8 snapshots drifted 7× Every change to the catalogue entry
Agent card snapshots
Captured Hash Snapshot
2026-10-18 19:17:50 current 0fb53cf12fec… view →
2026-10-17 08:59:23 5dd07ddcb020… view →
2026-10-14 04:24:43 1e779259a1c4… view →
2026-10-12 16:23:09 4af664b90080… view →
2026-10-12 15:50:58 c2c12dff0f07… view →
2026-10-09 12:27:03 7954396e3eaf… view →
2026-10-05 22:53:55 c2c12dff0f07… view →
2026-09-28 12:58:43 8ad32e36e683… view →
Uptime
not graded
catalogue listing · no agent card to probe
Response
—
last direct probe
Skills
0
declared
Streaming
—
SSE-capable

Endpoints

Pricing x402 on Base USDC Verified live · 402 challenge Dispute or improve this rating
From $0.0010 per call
Endpoint Price Currency
https://x402-doctor.fizzl.eu/api/v1/fix 0.05 USDC
https://x402-doctor.fizzl.eu/api/v1/diagnose 0.01 USDC
https://x402-doctor.fizzl.eu/api/v1/preflight 0.001 USDC
https://x402-doctor.fizzl.eu/api/v1/preflight/batch 0.005 USD
https://x402-doctor.fizzl.eu/api/v1/preflight/deep 0.01 USD
https://x402-doctor.fizzl.eu/api/v1/delivery-check 0.25 USD
Try it ↗ Opens the operator's playground / docs in a new tab.
Settlement wallet: 0x6b0f4651ed42893ab58139938175e4a69f175f25 on Base · basescan ↗
Listed by facilitators Coinbase CDP · 6 GoPlausible · 5 PayAI · 1
Observed on-chain inflow verified on-chain
Last 7d
$0.23
24 transfers · synced 2026-10-25
Last 30d
$6.31
185 transfers · synced 2026-10-25
USDC inflows on Base. Reproducible via eth_getLogs on USDC Transfer events to the wallet. Inflow to a wallet, not proof that every transfer was a paid call.
How the last 30 days were settled
x402-settled: $0.04 (100%) · 5 transfers sent by a known x402 facilitator (Coinbase)
Other: $0.00 plain transfers sent by the payer · $0.00 other contract calls · 1% of $6.59 classified so far. How we classify
Cross-check: Coinbase's Bazaar reports 154 calls in 30 days to this wallet across 26 listed resources; our ledger observed 184 transfers (5 facilitator-settled). Different counters; neither is assumed correct.
Daily 30-day observed-inflow history ↓ -42.5% trend
2026-09-29 2026-10-25
Last 30 days Peak 30-day total: $13.41 Data points: 27 Total tx (30d window): 185
Payment authenticity evidence confidence How we measure this →
recurring_independent_payers 4/5

Several distinct payers observed, including repeat payers, with no single payer dominating.

Assessed window
30d
26 active of 28 observed
Inflow assessed
$6.28
182 transactions
Payer identities
available
1 evidence caveat
shared_settlement_wallet — The settlement wallet is shared with other indexed agents, so inflow cannot be attributed to this agent alone.
Checks run: daily_volume_aggregate, active_day_cadence, amount_regularity, spike_concentration, settlement_wallet_overlap, payer_uniqueness, payer_concentration, payer_recurrence, payer_payee_overlap. Derived from agent_revenue_daily, agents.payment_wallet, agent_payment_transactions. Measured 2026-10-25.
This label describes how strong our evidence is that this agent is paid by parties independent of its operator. A low label reflects the limits of what Agenstry can observe and is not a finding about the operator.
Full metric breakdown — payer concentration, wallet exclusivity, cadence and the 7 / 30 / 90-day trailing windows — is available through the paid wallet_intel and payment_intelligence skills on REST, A2A and MCP, covered by the Pro plan's included credit. API docs →
Agent cardhttps://x402-doctor.fizzl.eu/.well-known/agent-card.json
Providerhttps://x402-doctor.fizzl.eu
Docshttps://x402-doctor.fizzl.eu
Discovered via
agentic_market cdp_discovery recrawl_warm smithery recrawl_hot x402_list

Health · last 25 probes

When HTTP Live JSON-RPC Latency
2026-10-23 10:02:38 404 — —
2026-10-23 03:33:35 404 — —
2026-10-18 23:04:41 404 — —
2026-10-13 00:24:02 404 — —
2026-10-10 01:52:08 404 — —
2026-10-09 17:37:57 404 — —
2026-10-09 07:05:36 404 — —
2026-10-09 00:06:04 404 — —
2026-10-08 09:50:16 404 — —
2026-10-07 12:32:49 404 — —

Similar agents embedding-nearest

buy.fizzl.eu
Buy the right paid API for your agent in one call: say what you need ("weather forecast Amsterdam tomorrow", "BTC price", "search the web fo
buy.fizzl.eu · q 65%
x402-doctor.onrender.com
Is this x402 endpoint safe to pay? Check it before your AI agent pays: go / caution / no_go, the recommended payment option, and why (paymen
x402-doctor.onrender.com · q 65%
agent-paycheck.onrender.com
Pre-payment risk and usefulness check for AI agents deciding whether to pay an x402 endpoint.
agent-paycheck.onrender.com · q 65%
x402helper.xyz
Paid test endpoint — verifies that AI agents can successfully complete x402 micropayments
x402helper.xyz · q 65%
x402 seller
pay-per-call API for AI agents — data feeds and curated skill bundles, paid in USDC on Base mainnet. Endpoints: /report ($0.01 connectivity
x402-seller-a5et.onrender.com · q 65%
wren-x402-doctor.wrenonbase.workers.dev
x402 test endpoint on Base mainnet. Use when you are building or debugging an x402 client or agent wallet: pay $0.001 USDC and get back what
wren-x402-doctor.wrenonbase.workers.dev · q 65%

Embed your Agenstry badge

Paste any of these into your README, agent card, or marketing page. Each badge auto-updates and links back to this page.

Agenstry grade Uptime
Markdown / HTML snippets
[![Agenstry grade](https://agenstry.com/badge/x402-doctor.fizzl.eu.svg)](https://agenstry.com/agents/x402-doctor.fizzl.eu)
[![Verified Business](https://agenstry.com/badge/x402-doctor.fizzl.eu/identity.svg)](https://agenstry.com/agents/x402-doctor.fizzl.eu)
[![Uptime](https://agenstry.com/badge/x402-doctor.fizzl.eu/uptime.svg)](https://agenstry.com/agents/x402-doctor.fizzl.eu)
[![A2A version](https://agenstry.com/badge/x402-doctor.fizzl.eu/protocol.svg)](https://agenstry.com/agents/x402-doctor.fizzl.eu)

Audit-grade evidence bundle

JSON snapshot for vendor-review files. Add ?sign=true for a JWS-signed envelope verifiable against our JWKS. See the methodology.

audit.json audit.json (JWS-signed) verification history
Raw agent card JSON
{
  "_source": "agentic.market",
  "service": {
    "id": "x402-doctor-fizzl-eu",
    "name": "x402-doctor.fizzl.eu",
    "description": "",
    "domain": "x402-doctor.fizzl.eu",
    "provider": "x402-doctor.fizzl.eu",
    "providerUrl": "",
    "category": "",
    "networks": [
      "Base",
      "algorand:wghe2pwdvd7s12bl5faop20egyesn73ktic1qzkkit8=",
      "solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp",
      "stellar:pubnet",
      "xrpl:0"
    ],
    "enriched": false,
    "endpoints": [
      {
        "url": "https://x402-doctor.fizzl.eu/api/v1/delivery-check",
        "description": "Does this x402 endpoint really deliver? x402 Doctor buys it once with the example input its own listing declares (at most $0.1, USDC on Base), checks the answer against the declared output schema and measures the charge on chain. Answers with a job id at once; the result is public, usually within 30 minutes. For sellers who want proof, and buyers before a big order.",
        "pricing": {
          "amount": "0.25",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "GET",
        "providerName": "",
        "parameters": [
          {
            "group": "query",
            "name": "url",
            "type": "string",
            "description": "",
            "example": "https://rest.coincap.io/v3/agentFriendly/full_assets_by_slug",
            "enumValues": [],
            "default": null,
            "required": false
          }
        ],
        "serviceName": "x402 Doctor",
        "tags": [
          "x402",
          "payments",
          "verification",
          "delivery",
          "trust"
        ],
        "quality": {
          "l30DaysTotalCalls": "1",
          "l30DaysUniquePayers": "1"
        }
      },
      {
        "url": "https://x402-doctor.fizzl.eu/api/v1/diagnose",
        "description": "Why is my x402 endpoint broken? Diagnose and debug an x402 payment endpoint (or MCP server) when payments fail: checks the 402 challenge, accepts[] (network, payTo, amount, asset), resource URL, Solana settlement readiness, which wallets and agents can pay, Bazaar/OpenAPI discovery and the browser paywall. Returns every check with a fix hint. Read-only: never pays. Bulk: 1000 credits for $0.80 via /api/v1/credits.",
        "pricing": {
          "amount": "0.01",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "GET",
        "providerName": "",
        "parameters": [
          {
            "group": "query",
            "name": "method",
            "type": "string",
            "description": "",
            "example": "GET",
            "enumValues": [],
            "default": null,
            "required": false
          },
          {
            "group": "query",
            "name": "url",
            "type": "string",
            "description": "",
            "example": "https://ichimoku-signal.fizzl.eu/signal/BTC-USDT",
            "enumValues": [],
            "default": null,
            "required": false
          }
        ],
        "serviceName": "x402 Doctor",
        "tags": [
          "x402",
          "developer-tools",
          "diagnostics",
          "debug",
          "payments"
        ],
        "quality": {
          "l30DaysTotalCalls": "6",
          "l30DaysUniquePayers": "5"
        }
      },
      {
        "url": "https://x402-doctor.fizzl.eu/api/v1/fix",
        "description": "How do I fix my broken x402 endpoint? Diagnoses it, then returns per problem the concrete change as code for your stack (Express, Next.js, Hono or raw HTTP), filled in with your own payTo, amount, network and route. Bulk: 1000 credits for $0.80 via /api/v1/credits.",
        "pricing": {
          "amount": "0.05",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "GET",
        "providerName": "",
        "parameters": [
          {
            "group": "query",
            "name": "url",
            "type": "string",
            "description": "",
            "example": "https://x402-doctor.fizzl.eu/demo/broken",
            "enumValues": [],
            "default": null,
            "required": false
          }
        ],
        "serviceName": "x402 Doctor",
        "tags": [
          "x402",
          "developer-tools",
          "fix",
          "code"
        ],
        "quality": {
          "l30DaysTotalCalls": "4",
          "l30DaysUniquePayers": "3"
        }
      },
      {
        "url": "https://x402-doctor.fizzl.eu/api/v1/preflight",
        "description": "Is this x402 endpoint safe to pay? Call it before your AI agent pays an endpoint it has not used before. Returns a go / caution / no_go verdict, the recommended payment option (network and amount) and the reasons (payment would fail, payout address on the OFAC sanctions list, over your budget, price above advertised, not HTTPS, unknown token). Never pays the endpoint. Cached 10 min. Bulk: 1000 credits for $0.80 via /api/v1/credits.",
        "pricing": {
          "amount": "0.001",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "GET",
        "providerName": "",
        "parameters": [
          {
            "group": "query",
            "name": "max_usd",
            "type": "string",
            "description": "",
            "example": "0.05",
            "enumValues": [],
            "default": null,
            "required": false
          },
          {
            "group": "query",
            "name": "url",
            "type": "string",
            "description": "",
            "example": "https://ichimoku-signal.fizzl.eu/signal/BTC-USDT",
            "enumValues": [],
            "default": null,
            "required": false
          }
        ],
        "serviceName": "x402 Doctor",
        "tags": [
          "x402",
          "payments",
          "safety",
          "pre-payment",
          "sanctions"
        ],
        "quality": {
          "l30DaysTotalCalls": "23",
          "l30DaysUniquePayers": "6"
        }
      },
      {
        "url": "https://x402-doctor.fizzl.eu/api/v1/preflight/batch",
        "description": "Are these x402 endpoints safe to pay? Up to 10 endpoints in one call (?url=a&url=b): per endpoint go / caution / no_go, the recommended payment option and why, plus totals. For marketplaces and agents that weigh several services. Never pays the endpoints. Bulk: 1000 credits for $0.80 via /api/v1/credits.",
        "pricing": {
          "amount": "0.005",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "GET",
        "providerName": "",
        "parameters": [
          {
            "group": "query",
            "name": "max_usd",
            "type": "string",
            "description": "",
            "example": "0.05",
            "enumValues": [],
            "default": null,
            "required": false
          },
          {
            "group": "query",
            "name": "url",
            "type": "array",
            "description": "",
            "example": [],
            "enumValues": [],
            "default": null,
            "required": false
          }
        ],
        "serviceName": "x402 Doctor",
        "tags": [
          "x402",
          "payments",
          "safety",
          "pre-payment",
          "batch"
        ],
        "quality": {
          "l30DaysTotalCalls": "2",
          "l30DaysUniquePayers": "2"
        }
      },
      {
        "url": "https://x402-doctor.fizzl.eu/api/v1/preflight/deep",
        "description": "Should my agent pay this expensive x402 endpoint? Call it before a costly or repeated payment. Returns the go / caution / no_go verdict plus the full diagnosis, the endpoint's check history per day over 30 days, how reliable the seller's other endpoints are and whether the endpoint moved domains. Never pays the endpoint. Bulk: 1000 credits for $0.80 via /api/v1/credits.",
        "pricing": {
          "amount": "0.01",
          "currency": "USDC",
          "network": "eip155:8453",
          "scheme": "exact",
          "maxAmount": "",
          "minAmount": ""
        },
        "method": "GET",
        "providerName": "",
        "parameters": [
          {
            "group": "query",
            "name": "max_usd",
            "type": "string",
            "description": "",
            "example": "0.5",
            "enumValues": [],
            "default": null,
            "required": false
          },
          {
            "group": "query",
            "name": "url",
            "type": "string",
            "description": "",
            "example": "https://ichimoku-signal.fizzl.eu/setups",
            "enumValues": [],
            "default": null,
            "required": false
          }
        ],
        "serviceName": "x402 Doctor",
        "tags": [
          "x402",
          "payments",
          "safety",
          "pre-payment",
          "due-diligence"
        ],
        "quality": {
          "l30DaysTotalCalls": "6",
          "l30DaysUniquePayers": "4"
        }
      }
    ],
    "integrationType": "",
    "isNew": false,
    "priceSummary": {
      "minAmount": "0.001",
      "maxAmount": "0.25",
      "avgCostPerTransaction": "0.054333",
      "avgCostBasis": "exact",
      "currency": "USDC"
    },
    "serviceName": "x402 Doctor",
    "tags": [
      "x402",
      "payments",
      "verification",
      "delivery",
      "trust",
      "developer-tools",
      "diagnostics",
      "debug",
      "fix",
      "code",
      "safety",
      "pre-payment",
      "sanctions",
      "batch",
      "due-diligence"
    ],
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1791125195/bazaar-icons/061c165bc4e51e45.png"
  }
}