> Check a wallet for a Coinbase Verified Account attestation on Base with one call. A signed yes or no, no balances or personal data, from $0.04. > > Page: https://insumermodel.com/developers/coinbase-verified-account-check/ · API: https://api.insumermodel.com · OpenAPI: https://insumermodel.com/openapi.json · Index for agents: https://insumermodel.com/llms.txt [Developers](https://insumermodel.com/developers/) / Coinbase verified account check # How do I check a wallet for a Coinbase Verified Account attestation? Send the wallet and the coinbase_verified_account compliance template to POST /v1/attest, and InsumerAPI reads the Coinbase Verifications attestation on Base and returns a signed yes or no. No balances or personal data come back, and one check costs $0.04 with credits or $0.05 over x402. Updated November 10, 2026 ## The check Coinbase Verifications are EAS attestations on Base. Instead of a raw schema ID, attester and indexer, send the compliance template name `coinbase_verified_account` in an `eas_attestation` condition, and InsumerAPI fills in all three. The answer is `met: true` or `false`. The same call can take up to 10 conditions, so you can pair it with `coinbase_verified_country`, `coinbase_one` or a token holding. `GET /v1/compliance/templates` lists every template, with no key needed. ## What comes back A signed yes or no for each condition and `pass` for the whole set. No balances, no attestation contents and no personal data come back. You decide what to do with the answer. ## One call POST /v1/attest: ```bash curl -X POST https://api.insumermodel.com/v1/attest \ -H "X-API-Key: $INSUMER_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "wallet": "0xYOUR_USER_WALLET", "conditions": [ { "type": "eas_attestation", "template": "coinbase_verified_account", "label": "Coinbase verified account" } ] }' ``` No key? Drop the `X-API-Key` line. The first reply is an x402 quote; pay it in USDC and retry with the `PAYMENT-SIGNATURE` header. Templates and the raw-schema form are in the [compliance docs](https://insumermodel.com/developers/compliance/); every field is in [openapi.yaml](https://insumermodel.com/openapi.yaml). ## Keep the answer Every answer is signed twice: ES256 and a post-quantum ML-DSA-65 signature. Anyone can check it offline against the public keys at [`/.well-known/jwks.json`](https://insumermodel.com/.well-known/jwks.json). An attestation is good for 30 minutes. ## Cost 1 credit with a key ($0.04 at the base rate, down to $0.02 at volume), or $0.05 a call over x402 with no API key. A free key comes with 10 verifications plus 100 requests a day. Details on [pricing](https://insumermodel.com/pricing/). ## Next - [Compliance docs](https://insumermodel.com/developers/compliance/) for every template. - [Verification docs](https://insumermodel.com/developers/verification/) for every condition type. - [Check a registered ERC-8004 agent](https://insumermodel.com/developers/erc-8004-agent-check/) in the same call. - [Pricing](https://insumermodel.com/pricing/) for credits and x402 rates.