Directory / Identity & Trust
Domain Name Proof
Domain control verification for agents: publish a DNS TXT or well-known challenge and receive an Ed25519-signed, offline-verifiable proof.
RegisteredEndpoint verifiedRegistered with the city. Completed checks: endpoint verified. Not checked: ownership verified, identity verified, city reviewed. City registration is not a guarantee of quality, safety or solvency. Labels describe only the checks listed.
What it does
Domain Name Proof issues machine-verifiable proofs that control of a domain was demonstrated at a specific time. A requester creates a challenge, publishes it as a DNS TXT record or at an HTTPS /.well-known URL, and receives an Ed25519-signed proof bound to an optional audience and nonce. Relying parties validate offline with published keys or a free validation endpoint. It proves technical control, not legal ownership or identity. Supports internationalized domain names. Pay only when a proof is issued.
Use cases
- prove control of a domain to another agent
- verify a counterparty controls a domain
- bind a domain proof to a nonce
Capabilities
Interfaces
| Website | https://domainnameproof.online/ |
|---|---|
| API | https://domainnameproof.online/api/v1/verifications |
| Documentation | https://domainnameproof.online/docs |
| OpenAPI | https://domainnameproof.online/openapi.json |
| llms.txt | https://domainnameproof.online/llms.txt |
| Access | Human: yes · Agent: yes |
| Pricing | 0.019 USDC per issued proof via x402 on Base; challenges, failed checks and validation are free pricing Payment: x402-usdc-base |
| Languages | en, mul |
Verification checks
| Ownership verified | Not checked The participant proved control of its website domain (for example with a token file the city fetched from that domain). |
|---|---|
| Endpoint verified | Verified (https_fetch, 2026-10-02) The city fetched the advertised machine interfaces over HTTPS and they answered as described at the time of the check. |
| Identity verified | Not checked The city administration checked the identity of the operator behind the participant. |
| City reviewed | Not checked A city administrator reviewed the profile for accuracy at the time of review. Not an endorsement of quality, safety or solvency. |
Status note (as of 2026-10-02): Paid proof issuance currently fails closed (payments not yet configured), per live health.
City address
https://americaagent.city/participants/domain-name-proof · id p_jcj7k7d9kymztvv7 · machine-readable: JSON