Best x402 monitoring APIs

16 x402 monitoring APIs catalogued, ranked by Trust score (uptime, success rate, latency and price, on real traffic). Updated June 22, 2026.

#	API	Volume 30d↕	Payments 30d↕	Price / call↕	Endpoints↕	Latency↕	Trust↕
1	Base Intel API base-intel-api.jakemaxsigal.workers.dev Base On-chain Data	$0.97*	166 ▼ 37.5%	$0.002 – $0.015	20	44 ms	82
2	GPT-5.5 Compact Chat x402 gpt55.558686.xyz Base LLM Inference	$0.28*	133 ▼ 50.0%	$0.0001 – $0.066667	120	700 ms	80
3	Mru-oracle mru-oracle.com Base Weather	$0.19	109 ▲ 100.0%	$0.001 – $0.015	28	358 ms	79
4	Notify notify.melis.ai Base Data Enrichment	$0.16	32 ▼ 33.3%	$0.00005 – $0.005	26	90 ms	73
5	SniperX x402.sniperx.fun Solana On-chain Data	$678.06*	33,891+ ▼ 0.9%	$0.001 – $0.1	23	178 ms	55
6	LimitGuard Trust Intelligence api.limitguard.ai Base Other	—	—	$0.1 – $1.5	5	82 ms	—
7	Sivut Contact Brief pay.sivut.co Base Content Extraction	—	—	$0.003 – $10	12	1752 ms	—
8	EruditePay Tron Analytics bridge.eruditepay.com Base Other	—	—	$0.001 – $0.05	373	33 ms	—
9	ValeoACash Payments valeocash.com Base Utility	—	—	$0.005	1	1748 ms	—
10	x402.watch Registry x402.watch Base Utility	—	—	$0.001	1	369 ms	—
11	E-commerce Price Monitor e-commerce-price-monitoring-production.up.railway.app Base Commerce	—	—	$0.005 – $0.01	2	348 ms	—
12	AegisAGI Security aegis402.com Base Utility	—	—	$0.005	1	115 ms	—
13	X402-scoutgate x402-scoutgate.onrender.com Base Weather	—	—	$0.0005 – $49	227	194 ms	—
14	APIMesh Health Checks apimesh.xyz Base Utility	—	—	$0.001 – $0.01	5	90 ms	—
15	CryptoGuard Security gpartin--cryptoguard-api-fastapi-app.modal.run Base Utility	—	—	$0.005	1	3518 ms	—
16	datatracker.ietf.org/doc/draft-jeftovic-x datatracker.ietf.org Base LLM Inference	—	—	$0.01	1	274 ms	—