Early access · October 2026

Measured, not bought.

Probegrade gives AI agents access to tools and APIs through one gateway, billed per use, with independent reliability ratings for the data they depend on.

$99/month for the gateway. Usage billed per call. No payment plumbing to build.

Top-scored sourcesOct 2026 · preliminary sample
1Cloudflare Docs MCP (remote)
MCP servers
100
2Zippopotam.us ZIP lookup
Geo
99
3Wikipedia REST Summary
Knowledge
99
4Official MCP Registry API
MCP servers
99
5Sunrise-Sunset
Weather
99
From 201 probes on 2026-10-15. Read the report →
Why Probegrade

One gateway for paying. One scoreboard for trusting.

Your agents need data from many providers. Probegrade handles the payments and tells you which sources are actually holding up.

One gateway, many tools

Agents call every listed tool and API through a single endpoint. We source the providers and set the terms, so you skip the contracts and keys.

Per-use billing, built in

The gateway speaks x402 v2 on Base and stays compatible with older v1 agents. Pay for each call, not for seats you never use.

Spend caps per call

The “upto” scheme lets an agent approve a ceiling and pay only for what it uses, so a runaway loop can't drain a budget.

Independent reliability ratings

Automated probes measure uptime, latency, schema validity, price and freshness for every listed source.

Sponsorship kept separate

Sponsored placement is labeled and never changes a score or rank. Scores are earned in measurements.

MCP-native

Plug Probegrade into any MCP client over stdio or remote Streamable HTTP, and let agents look up scores and call tools.

How a call works

An HTTP 402, a signature, and the data.

When payment is required, the gateway replies with a price. The agent signs and retries. The provider gets paid, and you get one invoice-ready usage log.

Gateway & x402 details →
# 1. Agent calls a tool through the gateway GET /v1/call/weather.forecast?lat=36.16&lon=-86.78 # 2. Gateway answers with the price HTTP/1.1 402 Payment Required PAYMENT-REQUIRED: {scheme:"upto", network:"eip155:8453", maxAmount:"…"} # 3. Agent retries with a signed payment, gets data PAYMENT-SIGNATURE: eyJ4NDAyVmVyc2lvbiI6Mi… HTTP/1.1 200 OK
The Probegrade Report

A dated, citable reliability edition every month.

Each edition freezes scores from that month's archived probes, with a hash so anyone can audit it. Providers can embed a dated badge.

See the October 2026 sample →

Give your agents data you can trust.

Early access is open for teams building with AI agents, and for data providers who want to be measured.