# Using the Subgraph

All the on-chain data is indexed via a subgraph, deployed for all networks and hosted via The Graph.

For example, the Linea mainnet subgraph can be found there:

{% hint style="info" %}
<https://api.studio.thegraph.com/query/67521/verax-v2-linea/v0.0.1>
{% endhint %}

As for the Linea Sepolia subgraph, you can access it here:

{% hint style="info" %}
<https://api.studio.thegraph.com/query/67521/verax-v2-linea-sepolia/v0.0.2>
{% endhint %}

You can also get access to all the subgraphs URLs from the project's [Readme file](https://github.com/Consensys/linea-attestation-registry?tab=readme-ov-file#subgraphs-urls).

You can use this default web interface to write queries in GraphQL to search through the attestation registry. Alternatively, you can use a tool such as Postman, or use the subgraph's API to query the registry directly from your own dApp.

Examples of queries that you can make using the subgraph:

1. Get all attestations, along with the respective schema string, and the decoded attestation data:

   ```graphql
   query MyQuery {
     attestations {
       attestationData
       decodedData
       schemaString
     }
   }
   ```
2. Give me all attestations related issued to a specific address:

   ```graphql
   query MyQuery {
     attestations(where: { subject: "0xd14BF29e486DFC3836757b9B8CCFc95a5160A56D" }) {
       attestationData
       decodedData
       schemaString
     }
   }
   ```
3. Give me all attestations issued to a specific address, related to a specific schema ID, that have not been revoked.

   ```graphql
   query MyQuery {
     attestations(
       where: {
         subject: "0xd14BF29e486DFC3836757b9B8CCFc95a5160A56D"
         schemaId: "0x7b2d17830782df831c39edcbd728a47f0a470d57fdf452b5f4226f467f48295e"
         revoked: false
       }
     ) {
       attestationData
       decodedData
       schemaString
     }
   }
   ```

As well as querying the attestation registry, you can query the schema registry, module registry, and portal registry. For example, if you want to browse the library of existing schemas:

```graphql
query SchemaQuery {
  schemas {
    name
    description
    id
    context
  }
}
```

***

To get more information on using the subgraph, please refer to [The Graph's documentation](https://thegraph.com/docs/en/).

The source code for our subgraph is available [in our monorepo](https://github.com/Consensys/linea-attestation-registry/tree/dev/subgraph), where you find info on deploying your own subgraph if you want to.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.ver.ax/verax-documentation/developer-guides/using-the-subgraph.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.