Ant Create Message Stream on Anthropic

Uploads a file via multipart to the Files API (beta header). Pass file_path on the server filesystem. Returns file id. Use before attaching to prompts if supported by your workflow.

Organization Admin: archive workspace (POST delete semantics per API).

Retrieves metadata for a single model id.

Lists files for your workspace (beta). Optional pagination limit.

Organization Admin: get one API key metadata by id.

Organization Admin: get workspace by id.

Lists models available to your key (id, display_name, created_at). Use to pick model ids for messages.

Adds stop_sequences JSON array to cut generation at custom delimiters. Returns stop_reason stopped_sequence when hit. Use for template completion; omit stops for open-ended replies.

Downloads file binary as base64 for small files (beta). Truncates very large payloads in text output.

Organization Admin: create API key (body fields depend on Anthropic admin schema). Pass create_body JSON.

Creates a Message Batch from a requests array (each entry: custom_id, params matching /messages). Returns batch id and processing status. Use for high-volume offline inference.

Gets one batch by message_batch_id including processing status and request counts.

Organization Admin: create workspace with JSON body.

Cancels an in-flight message batch.

Organization Admin: update workspace.

Gets file metadata by file_id (beta).

Sets temperature 0 (or near-zero) for deterministic outputs. Use for extraction/classification. For creative text use higher temperature on ANT_CREATE_MESSAGE.

Token count including tools JSON in the request. Use when your prompt includes tool definitions.

Lists message batches with pagination (limit, before_id, after_id). Use after ANT_CREATE_BATCH to monitor workloads.

Fetches usage summary (GET /usage). Path may be account-specific; returns API response or structured error for unsupported keys.

Organization Admin: list workspaces (experimental path; may require separate admin base URL).

Forces a specific tool name via tool_choice JSON e.g. {"type":"tool","name":"my_tool"}. Use when the workflow must invoke one tool. For normal auto tool routing use ANT_CREATE_MESSAGE_WITH_TOOLS.

Polls ANT_GET_BATCH until processing_status is ended or cancelled, or max_wait_ms. Returns final batch object.

Preset for multimodal user content: pass messages JSON with image blocks (base64 or url per Anthropic docs). Returns standard message response. Use when analyzing images; for text-only use ANT_CREATE_MESSAGE.

Nucleus sampling with top_p and optional top_k. Use to tune diversity vs ANT_CREATE_MESSAGE defaults.

Downloads batch results as JSONL text (one result per line). Use when batch status is ended. For status only use ANT_GET_BATCH.

Organization Admin: lists API keys (requires admin-capable key and correct Console API; path may vary by Anthropic product). Returns list or API error with guidance.

Deletes a file by id (beta).

Messages request with tools JSON and tool_choice auto. Use when the model must call tools in an agent loop. For plain answers without tools use ANT_CREATE_MESSAGE and omit tools.

Organization Admin: delete/revoke API key by id.

Organization Admin: PATCH/POST update for an API key id. Pass update_body JSON.

POST /messages/count_tokens with the same shape as /messages but returns input_tokens only. Use to estimate cost before calling ANT_CREATE_MESSAGE.

Calls POST /messages with full Claude parameters (model, messages, max_tokens, system, temperature, tools, tool_choice, stop_sequences, stream, metadata, top_k, top_p). Returns content blocks and usage. Use as the default Claude completion. For streaming set stream true (response may be partial in MCP). For forced tool use see ANT_CREATE_MESSAGE_TOOL_CHOICE.