OpenRouter API

API key for OpenRouter — a single gateway to hundreds of models (OpenAI, Anthropic, Llama, Mistral, and more).

Fields

Field	Description	Required
API Key	Your OpenRouter API key from openrouter.ai/keys	Yes
Base URL	Custom API endpoint (optional; defaults to https://openrouter.ai/api/v1)	No

Setup Steps

Step 1: Create an API key at openrouter.ai/keys
Step 2: In Falcon Builder, go to Dashboard → Credentials → Add Credential
Step 3: Select OpenRouter as the credential type
Step 4: Paste your API key (leave Base URL blank to use OpenRouter's hosted API)
Step 5: Click Test Credential to verify the connection
Step 6: In an AI Prompt or Agent Loop node, choose OpenRouter as the provider and pick a model by its vendor/model slug (e.g. anthropic/claude-sonnet-4.5)

Used By These Integrations

AI Prompt

Call LLMs (OpenAI, Anthropic, Google Gemini, Ollama, Mistral, OpenRouter) with custom prompts.

Agent Loop

Run a multi-turn AI agent (OpenAI, Anthropic, Google, Ollama, Mistral, or OpenRouter) that calls MCP tools and exposed sibling nodes until the task is done.

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