GET
/v1/schemas/anthropic/chat/v1%2Fmessages
Accept:
Request body
18 properties · 3 required · 97 $defs| property | type | description | constraints |
|---|---|---|---|
| model* | string | The model that will complete your prompt. | 17 known values |
| messages* | InputMessage[] | Input messages. | |
| max_tokens* | integer | The maximum number of tokens to generate before stopping. | n ≥ 0 |
| cache_control | CacheControlEphemeral | Top-level cache control automatically applies a cache_control marker to the last cacheable block in the request. | nullable |
| container | string | Container identifier for reuse across requests. | nullable |
| inference_geo | string | Specifies the geographic region for inference processing. If not specified, the workspace's `default_inference_geo` is used. | nullable |
| metadata | Metadata | An object describing metadata about the request. | |
| output_config | OutputConfig | Configuration options for the model's output, such as the output format. | |
| service_tier | enum | Determines whether to use priority capacity (if available) or standard capacity for this request. | auto | standard_only |
| stop_sequences | string[] | Custom text sequences that will cause the model to stop generating. | |
| stream | boolean | Whether to incrementally stream the response using server-sent events. | |
| system | string | RequestTextBlock[] | System prompt. | |
| temperature | number | Amount of randomness injected into the response. | 0 ≤ n ≤ 1 · deprecated |
| thinking | ThinkingConfigEnabled | ThinkingConfigDi… | Configuration for enabling Claude's extended thinking. | |
| tool_choice | ToolChoiceAuto | ToolChoiceAny | ToolCho… | How the model should use the provided tools. The model can use a specific tool, any available tool, decide by itself, or not use tools at all. | |
| tools | Tool | BashTool_20250124 | CodeExecutionTool_20250522[] | Definitions of tools that the model may use. | |
| top_k | integer | Only sample from the top K options for each subsequent token. | n ≥ 0 · deprecated |
| top_p | number | Use nucleus sampling. | 0 ≤ n ≤ 1 · deprecated |
Validate a payload
before you spend tokensshell
$ curl -X POST https://modelschemas.com/v1/validate \
-d '{"provider":"anthropic","endpointId":"v1/messages","payload":{…}}'
→ {"valid": false, "errors": [{"path": "#", "keyword": "required", …}]}