> ## Documentation Index
> Fetch the complete documentation index at: https://www.agentworldprotocol.com/llms.txt
> Use this file to discover all available pages before exploring further.

# initialize

> Version negotiation and manifest exchange. Agent → World.

<ParamField body="protocol_versions" type="string[]" required>Versions the agent supports, e.g. `["0.1"]`.</ParamField>
<ParamField body="agent" type="object" required>`{ name, version, vendor }`.</ParamField>
<ParamField body="consumes_modalities" type="string[]" required>Modalities the agent can decode.</ParamField>
<ParamField body="time_models" type="string[]">Modes the agent supports. Default: both.</ParamField>

**Result:** the [world manifest](/api-reference/schemas/world-manifest) with the selected `protocol_version`.

**Errors:** `AWP_VERSION_UNSUPPORTED` (1001).

```json awp:agent-manifest theme={null}
{ "jsonrpc": "2.0", "id": 1, "method": "initialize",
  "params": { "protocol_versions": ["0.1"],
              "agent": { "name": "quickstart", "version": "0.0.1", "vendor": "dev" },
              "consumes_modalities": ["text/event+json"] } }
```