Pay-per-call Base DEX and token diagnostics for AI agents: executable net-spread after gas, on-chain token safety audit, and depth/price-impact per pool. Payment in USDC on Base via x402.

A2A readiness

B · 80/100

Readiness is how fully this listing follows its protocol and how it behaved in our probes over 30 days. It is shown for reference and does not move it in search. Search order and leaderboards use the separate quality grade (here C+, 88.5/100), which weighs availability, conformance, card completeness and speed. How the two differ

Valid Agent Card	10/10	Parseable Agent Card with the required fields.
Live JSON-RPC	25/25	Endpoint answers A2A JSON-RPC (832 ms).
Protocol version	10/10	Declares A2A 1.0 with supportedInterfaces[] (v1 card shape).
JWS signature	0/10	Card is unsigned.
Uptime (30 days)	15/15	1/1 probes succeeded; final after 5 probes in 30 days.
Skill declaration	10/10	Declares 5 skill(s) with structured metadata.
Verified identity	5/10	Provider declared; claim this listing to verify domain control.
Freshness + modern flags	5/5	seen in a source within 7 days; declares a modern payment/commerce flag.
Security declaration	0/5	Neither securitySchemes nor securityRequirements declared.

Responsiveness: Responsive (832 ms; bands ≤2.5 s, ≤5 s, ≤8 s, slower; penalty only).

Payment evidence: agent_card — The listing's own card or descriptor declares payment. Also: catalog_listing. Qualifies the payment claim; adds no points.

Measured 2026-11-11.

Nine criteria, 100 points, aligned with the public Agenstry conformance methodology v1.1. Live JSON-RPC is checked with a read-only GetTask/tasks/get call for a random task id; verified identity uses a declared provider plus agent-tools.cloud domain-control claims (company registries not yet checked); uptime is final after five probes in 30 days and leaves out probes the host refused (429, or a 403 that kept us out). Grades: A>=90, B>=75, C>=60, D>=40, F<40. Display only: search order uses the quality grade.

Compared with peers

Against 6,287 reachable A2A agents in our daily snapshot (2026-11-11 14:47 UTC). Display only; it does not change search order.

Readiness: Higher than 94% of peers; This listing 80 · peer median 54
Latency: Faster than 13% of peers; This listing 792 ms · peer median 373 ms

Where it loses the most points

JWS signature −10 — Card is unsigned.
Verified identity −5 — Provider declared; claim this listing to verify domain control.
Security declaration −5 — Neither securitySchemes nor securityRequirements declared.

How many agent tools actually work · All statistics

Skills

Base DEX Net-Spread Engine

Real-time executable net-spread quotes after gas across Base DEXs (Aerodrome, Uniswap V3) for AI arbitrage & routing. Paid per call: 0.005000 USDC via x402 on Base (EIP-3009, settled by CDP Facilitator).

arbitragedexbasenet-spreadmevonchain-quotex402usdcprice-0.005000
Base Token Safety Auditor

Token safety audit for Base contracts: honeypot detection, buy/sell tax, ownership renounce and mint status for AI agent token screening. Paid per call: 0.002000 USDC via x402 on Base (EIP-3009, settled by CDP Facilitator).

securitytoken-auditbasehoneypotonchain-quotex402usdcprice-0.002000
Base DEX Depth & Impact Estimator

Real-time price impact and slippage for $100/$500/$1,000 swaps across Uniswap V3 and Aerodrome pools on Base, per fee tier. Paid per call: 0.003000 USDC via x402 on Base (EIP-3009, settled by CDP Facilitator).

dexprice-impactslippagebaseonchain-quoteliquidityx402usdcprice-0.003000
PDF Text Extractor

Extract per-page text from an uploaded PDF locally (no OCR): page-count, text, and char counts for agent context windows. Paid per call: 0.002000 USDC via x402 on Base (EIP-3009, settled by CDP Facilitator).

pdfextracttextdocumentscontext-windowx402baseusdcprice-0.002000
OpenStreetMap Geocoder

Geocode a place name to coordinates via OpenStreetMap/Nominatim (cached, rate-limited). Returns display name, lat/lon, OSM id, and attribution. Paid per call: 0.001000 USDC via x402 on Base (EIP-3009, settled by CDP Facilitator).

geocodeosmlocationmapscoordinatesx402baseusdcprice-0.001000

How to call

A2A endpoint (JSONRPC)

https://api.x402hub.site/a2a

Agent card

https://api.x402hub.site/.well-known/agent-card.json

Documentation

https://api.x402hub.site/.well-known/x402

Homepage

https://api.x402hub.site

Listed in

Directories this entry was found in.

a2a-registry since 2026-11-11