LangChain.
Ready for voice.

Connect in your client

1. Install a LangChain version with the MCP extra (langchain[mcp]>=1.4.0). This API is currently beta.
2. Run the discovery example below inside your async application.
3. Select the three apifleet_ public tools for anonymous use. Adding a model or executing paid workspace actions is a separate step.

from langchain.mcp import MCPAdapter

async def discover_apifleet():
    async with MCPAdapter("https://apifleet.dev/mcp") as adapter:
        return await adapter.list_tools()

Client setup reference: official documentation. Reviewed 22 October 2026. Client versions and account controls may differ; these are connection recipes, not marketplace listings.

Try one useful request

Estimate the cost of 600 connected AI seconds with $0.04/minute providers and $0.01/minute carrier using apifleet_estimate_call_cost.

The illustrative ten-minute workload returns $0.30 platform + $0.40 providers + $0.10 carrier = $0.80 estimated total. Provider and carrier rates are example inputs, not vendor quotes.

• apifleet_get_provider_matrix: Public, no key: discover implemented voice and carrier integrations, setup boundaries, platform pricing and documentation. No provider request or call is made.
• apifleet_estimate_call_cost: Public, no key: calculate USD platform fees plus caller-supplied blended provider/carrier rates. An estimate, not a provider quote or invoice. Does not place a call.
• apifleet_check_assistant_config: Public, no key: seven static configuration checks. Send a redacted configuration without secrets or customer data. No save, credential verification, full API validation or call-quality certification occurs.

Move into your workspace

Create a key in API keys, then configure Authorization: Bearer <key> privately in a compatible client. A key grants full workspace access. Cookies do not authenticate MCP requests.

Without a key, private tools return ERR_API_KEY_REQUIRED with the key and funding paths. Paid calls retain the prepaid billing checks: $0.03 per connected AI minute plus providers and carrier, minimum $10 funding, no subscription or trial credits.

Read the protocol and authenticated examples. Do not auto-approve paid calls, destructive changes or live route changes.

If the connection fails

Check that the transport is Streamable HTTP and the URL ends in /mcp. A 405 on a browser GET is expected: tools use POST. A 401 with a configured key means the key needs checking; an expired key does not fall back to anonymous access. If your client only supports OAuth or legacy SSE, choose a compatible client or transport.