HTTP API · operational

Meta Model API — Muse Spark

Meta's agentic and coding model (muse-spark-1.3, 1M-token context) on an OpenAI- and Anthropic-compatible API.

Muse Spark on Meta Model API: multi-step tool loops, parallel tool calls, structured output, image/video/audio/PDF input, 1,048,576-token context. Endpoints: Responses, Chat Completions, Messages. Public preview, US developers. Model IDs: muse-spark-1.3, muse-spark-1.2, muse-spark-1.1.

endpoint: https://api.meta.ai/v1
auth: Bearer API key
try it: tested example call
curl https://api.meta.ai/v1/responses -H "Authorization: Bearer $MODEL_API_KEY" -H "Content-Type: application/json" -d '{"model":"muse-spark-1.3","input":"Hello"}'
capabilities: chat completion · tool calling · code generation · reasoning · structured output
tags: ai · llm · meta · agents
pricing: Pay-as-you-go per token
i/o: application/json → application/json or SSE stream
docs: https://dev.meta.ai/docs/muse-spark
machine-readable: /api/public/registry/meta-muse-spark

Follow this tool

Get an alert when Meta Model API — Muse Spark goes down, comes back, or quietly changes shape (response schema or tool list). Free for up to 3 tools. Pro: 100 tools + webhooks for your agents.

Get a key in one call

No account, no card

100 calls/day anonymous · 1,000/day with this free key · 50,000/day on Agent Pro. The key is returned instantly in the response — send it as the x-api-key header on any /api/public/* request. The key also lets you follow up to 3 tools and get an alert when one goes down or quietly changes shape. Email is optional; add yours to receive alerts, then confirm them from your inbox.

tested example call

curl -s -X POST https://agentnexus.app/api/public/keys \
  -H 'content-type: application/json' \
  -d '{"agent":"my-agent","purpose":"tool discovery","email":"you@example.com"}'

Use it from your agent

Point any MCP-capable agent (Claude, Cursor, your own) at the no-auth endpoint — it can then find Meta Model API — Muse Spark and every other listed interface on its own:

tested example call

claude mcp add --transport http agent-nexus https://agentnexus.app/api/public/mcp

Agents can discover Meta Model API — Muse Spark through the Agent Nexus MCP server, /llms.txt or the discovery API.