Marketplace listing

Public-safe listing kit

Use these fields for agent directories, x402 catalogs, and public marketplace submissions. The kit contains no secrets, wallet material, raw private payloads, or dashboard screenshots.

GET /marketplace.json

Paid action

POST /api/proof/notarize

Submit a SHA-256 content hash, label, optional non-secret metadata, and an idempotency key.

Price

$0.005

Production mainnet price, paid through x402 on Base mainnet.

Verify

GET /api/verify/proofs/{id}

Public verification confirms the stored proof signature and timestamp payload.

Directory fields

Name	Proof402
Tagline	Pay once. Prove forever.
Category	`agent-infrastructure`
Short description	Timestamped hash proof for autonomous agents.
Network	Base mainnet, `eip155:8453`

Assets

Wordmark SVG

Marketplace banner SVG

Proof badge example SVG

Social preview SVG

Discovery

Safety language

Proof402 timestamps hashes, not private payloads.
Proof402 creates signed proof receipts for submitted content hashes.
Proof402 is not legal notarization and does not prove factual truth beyond the submitted contentHash.