Best x402 monitoring APIs

16 x402 monitoring APIs catalogued, ranked by Trust score (uptime, success rate, latency and price, on real traffic). Updated August 6, 2026.

#	API	Volume 30d↕	Payments 30d↕	Price / call↕	Endpoints↕	Latency↕	Trust↕
1	GPT-5.5 Compact Chat x402 gpt55.558686.xyz Base LLM Inference	$109.49*	9,426 ▼ 63.3%	$0.0001 – $10	226	—	94
2	Mru-oracle mru-oracle.com Base Weather	$0.39	287 ▲ 100.0%	$0.001 – $0.015	28	—	84
3	Base Intel API base-intel-api.jakemaxsigal.workers.dev Base On-chain Data	$0.27*	50	$0.002 – $0.015	20	—	75
4	SniperX x402.sniperx.fun Solana On-chain Data	$386.20*	19,302	$0.001 – $0.1	23	—	48
5	Notify notify.melis.ai Base Data Enrichment	$0.09	17	$0.00005 – $0.005	27	—	24
6	LimitGuard Trust Intelligence api.limitguard.ai Base Other	—	—	$0.1 – $1.5	5	—	—
7	EruditePay Tron Analytics bridge.eruditepay.com Base Other	—	—	$0.001 – $0.05	373	—	—
8	Sivut Contact Brief pay.sivut.co Base Content Extraction	—	—	$0.003 – $10	12	—	—
9	E-commerce Price Monitor e-commerce-price-monitoring-production.up.railway.app Base Commerce	—	—	$0.005 – $0.01	2	—	—
10	ValeoACash Payments valeocash.com Base Utility	—	—	$0.005	1	—	—
11	x402.watch Registry x402.watch Base Utility	—	—	$0.001	1	—	—
12	X402-scoutgate x402-scoutgate.onrender.com Base Weather	—	—	$0.0005 – $49	227	—	—
13	APIMesh Health Checks apimesh.xyz Base Utility	—	—	$0.001 – $0.01	5	—	—
14	AegisAGI Security aegis402.com Base Utility	—	—	$0.005	1	—	—
15	CryptoGuard Security gpartin--cryptoguard-api-fastapi-app.modal.run Base Utility	—	—	$0.005	1	—	—
16	datatracker.ietf.org/doc/draft-jeftovic-x datatracker.ietf.org Base LLM Inference	—	—	$0.01	1	—	—