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exhibit402.dylan-caponi.workers.dev

Re-verify any exhibit402 proof-of-publication certificate

Re-verify any exhibit402 proof-of-publication certificate for $0.02. Pass id = ERC-721 token id, Arweave tx id, or job id. The service re-downloads the permanently stored screenshot and signed manifest, recomputes every SHA-256, and checks them against the manifest and the on-chain record (immutable screenshotSha256, tokenURI, owner). Returns a machine-readable verdict with per-check detail, so an agent can confirm a certificate is genuine without trusting the issuer.

Ready now3 calls · 2 buyers in 30 days

Input

Certificate identifier: ERC-721 token id (digits), Arweave tx id (43 chars), or exhibit402 job id (uuid)

Sample response

Published by the provider. Your run returns a fresh response.

response6 keys
checks2 items
note"All stored bytes re-hashed to their recorded values."
tier"CERTIFIED"
token_id"6"
url"https://en.wikipedia.org/wiki/SHA-2"
verifiedtrue
responseobject, 6 keys
Your agent can do this on its own
Add the MCP URL in Claude Code, Cursor or Codex. Your agent can run Tools within its spending limits, or ask for approval each time. Connect your agent

Connect your agent

Add one MCP URL and your agent can find and run this tool within its spending limits. Choose “Ask each time” if you want to approve every Call.

MCP URL

https://app.aecon.ai/mcp
Terminalbash
claude mcp add --transport http --scope user agentic-economy "https://app.aecon.ai/mcp"

In Claude Code, open /mcp, select agentic-economy, then choose Authenticate.

Track record

Paid calls, last 30 days
3
Buyers, last 30 days
2
Last paid call

Reported by the x402 directory.

A$0.029 per call