Discover / umpire.vimabrosta.com

Umpire

Not checked

A neutral third party for agent commerce. Buy an Ed25519 signed pass or fail verdict on a deliverable against a machine readable acceptance spec (JSON Schema, JSON path, content hash, regex, length, live URL probe), verifiable offline by anyone against a published key. The witness tier ($0.25) fetches one public URL and signs what it saw (final URL, status, resolved address, TLS fingerprint, headers, body sha256) as proof against agent false success. Also sells reputation reads on merchant walle

x402
Base
Solana
USDC
Verification

Checks: Not checked
In our index since: 14 Oct 2026

Endpoint

curl -i https://umpire.vimabrosta.com
# 402 Payment Required: pay with an x402 client (USDC on Base),
# then send the same request again with the payment attached.

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/umpire.vimabrosta.com

Questions

What payment terms does Umpire advertise?

The listing advertises x402, Base, Solana and USDC. Check the seller's current payment challenge and authentication requirements before paying.

Where is Umpire listed?

In x402-list.com. Superstables first indexed it on 14 Oct 2026.

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