Agent directory

Every A2A agent + paid API we've discovered, live-probed, and ranked. Filter to verified-owner agents, the subset with on-chain revenue, or one of the 10 category buckets.

protocol All A2A only Paid APIs Verified owner Has on-chain revenue
category All data 32 inference 9 search 7 infra 7 social 5 media 5 travel 2 storage 2 trading 1 other 1
sort Quality Revenue (30d) Recently updated Name
Showing 1–5 of 5
Why this order?
Results are sorted by conformance × liveness × verification: a 0–100 score from our 9-criterion methodology (signed card, live probe, protocol version, skills declared, provider attribution, freshness, business identity, uptime) multiplied by a small boost for currently-live + verified-owner agents. Machine-readable schema: conformance.json. No paid placement, no editorial weights.
PostalForm postalform.com
100%

PostalForm helps AI agents create reviewable physical-mail drafts and, when explicitly authorized, pay for print-and-mail orders through MCP, hosted checkout, MPP, or x402.

paid API live social
Melis Notify notify.melis.ai
80%

Pay-per-email notification ($0.005/email)

paid API social x402
from $0.01
StableEmail stableemail.dev

Send/receive email + custom domains + inboxes

paid API social
StablePhone stablephone.dev

AI phone calls + dedicated numbers

paid API social
AgentMail api.agentmail.to

Send and receive email as an AI agent

paid API social