---
title: "The A2A Agent Card (specification v1.0)."
method: GET
path: "/.well-known/agent-card.json"
tags: ["Discovery"]
---

# The A2A Agent Card (specification v1.0).

`GET /.well-known/agent-card.json`

## Request

- Base URL: `https://api.fidren.net`
- URL: `https://api.fidren.net/.well-known/agent-card.json`
- Auth: none required

A public capability document describing what Fidren does, the one interface it serves, its skills, and its security requirements — the anonymous one first, because no credential is needed to call.

Served as `application/a2a+json`. Requires no credential: discovery cannot demand a key the discovering agent does not have yet.

The same document is served from `https://fidren.net/.well-known/agent-card.json`.

## Response `200`

The Agent Card.

- object

## Other responses

- `503`: The card could not be served. Emitted rather than publishing a card that the non-custodial boundary check refused.

---

[API](https://skmtc.dev/fidren/apis/fidren-decision-api.md) · [All operations](https://skmtc.dev/fidren/apis/fidren-decision-api/llms.txt) · [OpenAPI document](https://skmtc.dev/fidren/apis/fidren-decision-api/revisions/d4b4dafcb345?raw)