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Openrouter for AI agents

OpenRouter is a unified API for accessing large language models from many different providers through one endpoint. Developers use it to switch between models without integrating each provider separately. Connect it once through Arc0, and your agent, or Claude, ChatGPT and Cursor, can use it through one MCP endpoint, limited to what each user approved.

Connect OpenrouterSee the 13 actions ↓
AI and modelsAPI keyMCP + RESTopenrouter.ai
AUDIT LOG · OPENROUTERPOLICY: acme-support
09:41:07 · claude · u_8f2read
openrouter.list_providers
OpenRouter List Providers✓ allowed · 212ms
09:41:08 · claude · u_8f2read
openrouter.get_credits
Get Credits✓ allowed · 164ms
09:41:09 · claude · u_8f2write
openrouter.create_message
Create Message (Anthropic Format)✓ approved · approved by user
EVERY OPENROUTER CALL, ON THE RECORD
01 · USE CASES

What agents do in Openrouter.

01

Generate a chat completion

Send a prompt to a chosen model through the unified endpoint and return the response.

02

Check available models read-only

List available models and their pricing before routing a request to the best fit.

03

Check remaining credits

Look up the account's credit balance read-only before running a large batch of requests.

02 · ACTIONS

13 Openrouter actions, graded by risk.

Every Openrouter action is tagged read, write or destructive, so one policy covers the whole app and new actions inherit the right default.

read

10

Look things up. Allowed by default.

  • openrouter.get_credits
    Get Credits
  • openrouter.get_generation
    Get Generation
  • openrouter.list_providers
    OpenRouter List Providers
  • openrouter.get_current_key
    Get Current Key
  • openrouter.get_models_count
    Get Models Count
  • openrouter.list_user_models
    List User Models
  • openrouter.list_zdr_endpoints
    OpenRouter List ZDR Endpoints
  • openrouter.list_model_endpoints
    OpenRouter List Model Endpoints
  • openrouter.list_available_models
    List Available Models
  • openrouter.list_embedding_models
    List Embedding Models

write

3

Create and change things. Allow, or ask the user first.

  • openrouter.create_message
    Create Message (Anthropic Format)
  • openrouter.create_chat_completion
    Create Chat Completion
  • openrouter.create_coinbase_charge
    Create Coinbase Charge

destructive

0

Delete, cancel or archive. Ask first, or deny outright.

  • No destructive actions.
03 · HOW IT WORKS

Openrouter in three steps.

  1. 01Your users connect OpenrouterThey add their Openrouter api key on Arc0 Connect, under your brand. It goes straight into the vault.
  2. 02You set the rulesReads run, and writes like “create Message (Anthropic Format)” can wait for the user to approve.
  3. 03Any agent can actYour agent calls Openrouter through the Arc0 SDK or MCP, and so can Claude, ChatGPT and Cursor. Every call lands on the audit log.
POLICY.TS
await arc0.policies.set('openrouter', {
  read: 'allow',
  write: 'ask',        // create_message
  destructive: 'deny',  
})

# Claude Code: the same connection, one URL
$ claude mcp add --transport http arc0 \
    https://mcp.arc0.ai/u/u_8f2
04 · AUTH AND DATA

How Openrouter connects.

Users add their Openrouter api key on Arc0 Connect. It is encrypted in the vault, never shown to the model, and each user can rotate or revoke it at any time.

The same Openrouter connection serves your agent over MCP and your own backend over REST and the proxy, so a user connects once. How Arc0 handles credentials →

AUTH
API key
CREDENTIALS
Per-tenant encrypted vault
MODEL SEES
Results only, never credentials
AUDIT LOG
Every call, on every plan
05 · WORKS WITH

Use Openrouter from any agent.

Claude
ChatGPT
Cursor
Codex
VS Code
OpenAI Agents SDK
Claude Agent SDK
Vercel AI SDK
Mastra
LangGraph
06 · RELATED

More ai and models apps.

Perplexity AI9 actionsAffinda119 actionsAgent Mail5 actionsAI/ML API30 actionsAivoov1 actionsAll Images AI7 actionsAltText.ai10 actionsAltTextLab2 actions
ALL AI AND MODELS APPS →
07 · FAQ

Openrouter and Arc0, answered.

Q01

Can I use Openrouter with Claude, ChatGPT or Cursor?

Yes. Connect Openrouter to Arc0 once, then add your Arc0 MCP URL to Claude, ChatGPT, Cursor, Claude Code or any other remote-MCP client. Each assistant only gets the Openrouter actions you allow.

Q02

How do users connect Openrouter?

Users add their Openrouter api key on Arc0 Connect. It is encrypted in the vault, never shown to the model, and each user can rotate or revoke it at any time.

Q03

Which Openrouter actions can my agent take?

13 in total: 10 read, 3 write and 0 destructive, such as “create Message (Anthropic Format)”. Your policies decide which of them each agent may call.

Q04

Can I make my agent read-only in Openrouter?

Yes. Allow read actions and deny writes in the Openrouter policy. Your agent can still look things up, and any write it attempts is blocked and logged.

Q05

Can my own backend call Openrouter too?

Yes. The same Openrouter connection is available over REST and through the Arc0 proxy, so your product and your agent share one connection per user.

Get started

Plug Openrouter into your agent.

Your users connect Openrouter once, under your brand. Your agent gets 13 actions behind your policies, with every call on the record.

Connect OpenrouterBrowse all apps →

Free to build · MCP + REST · Audit log on every plan