API Overview

Integrate TAGBASE verification into your applications.

Introduction

The TAGBASE API enables developers to:

• Query claims — Retrieve claims associated with URLs

• Fetch verifications — Get verification details by ID

• Initiate ownership challenges — Request wallet signature verification

• Submit ownership proofs — Validate blockchain ownership

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Base URL

https://api.extension.tagbase.io

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Authentication

No authentication required. The TAGBASE API is fully public and accessible without API keys.

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CORS Support

The API supports cross-origin requests from any domain:

Access-Control-Allow-Origin: *

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Response Format

All responses are JSON:

Success Response:

{
  "claims": [ ... ]
}

Error Response:

{
  "error": "resource_url is required"
}

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Core Endpoints

Endpoint	Method	Description
/claims?resource_url=...	GET	Get claims for a URL
/verifications/{id}	GET	Get verification by ID
/ownership/challenge	POST	Request ownership challenge
/ownership/proof/ethereum	POST	Submit Ethereum proof
/ownership/proof/cardano	POST	Submit Cardano proof

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Quick Start Examples

Fetch Claims for a URL:

curl "https://api.extension.tagbase.io/claims?resource_url=https://example.com/product"

Fetch a Verification:

curl "https://api.extension.tagbase.io/verifications/VRF_abc123def456"