x402 Observatory

Independent live audit of the x402 agent-payment ecosystem · by PulseFeed

2053
live services (unique)
23105
payable endpoints
24882
return a valid 402
36733
endpoints tracked
20%
dead or invalid

Catalog accuracy audit

84% of listed "healthy" actually work

The 402index catalog lists 4516 x402 services as healthy. Under PulseFeed's independent live probe, only 3806 return a valid x402 challenge — we caught 710 that catalogs call live but are actually dead or broken. This gap is exactly why agents shouldn't trust a listing blindly.

Safety & risk (live services)

clean
15160
low
8221
medium
919
high
582

Scam/anomaly scan: payTo hijack, price bait-and-switch, honeypot payTo, non-USDC asset, unverified receiver.

Receiver trust (on-chain, Base)

established (holds/receives USDC)
5459
active
0
dormant (no USDC held)
52
fresh (unverified)
44
pending scan
18764

We verify the payTo address on-chain: does it actually hold / receive USDC, or is it a fresh unproven address?

Provider concentration

api.delx.ai
995
api.m2mcent.com
965
intel.rallylive.ca
822
pay.edge-agents.ai
792
api.gocreativeai.com
675
agent402.tools
598
clonecho.builda.company
564
api.x402node.dev
520

Endpoints per domain. The x402 ecosystem is narrow — a handful of providers account for most live endpoints.

Networks (live)

Base
24313
Solana
342
Base Sepolia
156
amanchain-mainnet
45
eip155:196
17

Price per call

free/≤$0.001
2379
$0.001–0.01
6785
$0.01–0.1
11443
$0.1–1
3578
$1+
566
unknown
131

Top trusted services

ServiceNetworkPriceTrust
Otto AI — Crypto News Base $0.001 100
Laso Finance: Get Auth Token Base $0.001 100
TensorFeed Whats New (ecosystem deltas) Base $0.02 100
https://proxy.suverse.io/v1/data/fiat-exchange-rates Base $0.05 100
Mycelia Signal — BTC/USD Price Base $0.01 100
https://scout.hugen.tokyo/scout/devto Base — 100
AI Image Asset Generator Base — 100
CryptoSlate List Available Articles Base — 100
GPT-5.5 x402 Bazaar Search Base — 100
https://2s.io/api/convert/unit Base $0.001 100
JSON Recon — Full Schema Extraction Base — 100
Crypto ETF Sentinel /v1/agent/filings/recent Base — 100
PayPerByte — Earthquakes Base — 100
Biotech Catalyst Sentinel — upcoming FDA PDUFA dates Base $0.02 100
Analyze the short-term base fee trend on Base or Ethereum to adv Base $0.004 100
For AI agents — before paying an unknown x402 endpoint, verify it first:
GET /trust?endpoint=<url> → live validity, reputation, on-chain receiver profile, scam flags & a pay/avoid verdict.

For builders — the data API at pulsefeed.dev is free since 2026-09-02 (trust oracle, track records, datasets, drift history; no key, CORS). Pay-per-call remains only for real-time Base on-chain token intelligence (token pulse, whale alerts, smart-money flow, momentum) + the x402 trust oracle. Pay-per-call via x402 (USDC on Base).

Methodology: PulseFeed crawls x402 catalogs (CDP Bazaar + 402index), independently probes every endpoint for a valid x402 challenge, cross-checks sources, verifies each payTo on-chain, and tracks payTo/price history over time to detect hijacks & drift. 🔔 What changed (last 7 days) · 📈 State of x402 report (daily) · Machine-readable: /status.json · /changes.json · /reports.json · /openapi.json
20% of tracked x402 endpoints are dead or invalid. Last crawl: 2026-09-22T01:00:30.393Z. Data updates daily.