> For the complete documentation index, see [llms.txt](https://docs.tonic.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tonic.ai/textual/textual-integrations/textual-a2a-agent/about-the-textual-a2a-agent.md).

# About the Textual A2A agent

The Textual A2A agent provides access to Tonic Textual sensitivity detection and redaction as a built-in [A2A protocol](https://a2a-protocol.org/) agent.

## Available tasks

External orchestrators, LLM frameworks, and agent marketplaces that speak A2A can:

* Detect sensitive values in a provided text string.
* Redact sensitive values in a provided text string or file.

## Supported A2A protocol versions

Textual supports the following versions of the A2A protocol:

* v0.3
* v1.0

## Getting the A2A agent card

To get the Textual A2A agent card, call `GET /.well-known/agent-card.json`.

The agent card includes:

<table><thead><tr><th width="248.24609375" valign="top">Field</th><th valign="top">Value</th></tr></thead><tbody><tr><td valign="top">Agent</td><td valign="top"><code>Textual</code>, v1.0.0, provider <code>Tonic.ai</code></td></tr><tr><td valign="top">Interface</td><td valign="top"><p>JSON-RPC at <code>https://&#x3C;host>/a2a</code></p><p>REST at <code>https://&#x3C;host>/a2a/v1/*</code></p></td></tr><tr><td valign="top">Skills</td><td valign="top"><code>pii-detect</code>, <code>pii-redact</code>, <code>file-redact</code></td></tr><tr><td valign="top">Input modes</td><td valign="top"><code>text/plain</code>, <code>application/json</code>, <code>application/pdf</code></td></tr><tr><td valign="top">Output modes</td><td valign="top"><code>application/json</code>, <code>text/plain</code></td></tr><tr><td valign="top">Capabilities</td><td valign="top">Streaming, push notifications</td></tr><tr><td valign="top">Security</td><td valign="top">OAuth2 authorization-code flow that points to the instance's built-in token endpoints.</td></tr></tbody></table>


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# Agent Instructions
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## Querying This Documentation
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Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:

```
GET https://docs.tonic.ai/textual/textual-integrations/textual-a2a-agent/about-the-textual-a2a-agent.md?ask=<question>&goal=<user_goal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
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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.