The request names CallerKit, so it comes first: CallerKit is a caller ID and reverse phone lookup API with REST integration and an MCP server 1. None of the other candidates is a direct caller ID or phone lookup service; Twilio and KaiCalls cover telephony more broadly 27.
- 1
CallerKitcaller-kit.comwebsite read, tools not yet checked
Caller ID API and global phone lookup offering real-time caller identification, reverse phone lookup and REST API integration, with an MCP server door 1.
official:MCP server · CallerKit
- 2
Twiliotwilio.comverified and signed
Communications platform whose Call Phone action places a call and reads a message aloud, usable for phone-based lookup workflows 212.
official:SDK · twiliolibrary · Twilioskill · twilio-send-messageSDK · twilio+21 community tools built for it
for agents: make_call · custom_api_call · twilio-developer-kit
- 3
KaiCalls AI Receptionistkaicalls.comverified and signed
Phone service with a built-in AI secretary that answers calls, collects caller details and qualifies leads, with an MCP server door 717.
official:MCP server · KaiCalls
for agents: Lead Intake & Qualification · Appointment Booking · Outbound Calling
Sources
- 1Caller ID API & Global Phone Lookup | CallerKitcaller-kit.com · read 2026-10-29
- 2Docs: API Reference, Tutorials, and Integration | Twiliotwilio.com · read 2026-10-29
- 7KaiCalls AI Receptionist | Your Number, Secretary Built Inkaicalls.com · read 2026-10-29
- 12Twilio (Activepieces): declares "make_call" (the record we read and signed)unfragile.ai · read 2026-10-24
- 17KaiCallsAgent: declares "Lead Intake & Qualification" (the record we read and signed)unfragile.ai · read 2026-10-24
For agents: the 10 actions behind this answer
· Caller ID API & Global Phone Lookup website read, tools not yet checked
CallerKit — Powerful Caller ID & Phone Lookup API for developers and companies. Real-time caller identification, reverse phone lookup, global coverage, and easy REST API integration. Try our API Playground for free online caller ID, phone number lookup, and searching contacts by name or email.
make_call · Twilio (Activepieces) verified and signed
Call Phone — Call a number and read a message aloud.
calls_add · Slack Web API verified and signed
Registers a new Call.
custom_api_call · GitHub (Activepieces) verified and signed
Custom API Call — Make a custom API call to a specific endpoint
livekit · livekit verified and signed
copilotkit · copilotkit verified and signed
Use when building with CopilotKit — setup, development, integrations, debugging, upgrading, or contributing. Routes to the appropriate specialized skill based on the task.
Lead Intake & Qualification · KaiCallsAgent verified and signed
Collect caller information, qualify leads by case type or service need, and push to CRM.
· Invokta website read, tools not yet checked
Invokta is the action layer for the agent ecosystem. Package what your product knows how to do as actions any agent can invoke from code, the CLI, or MCP, with one implementation and one contract behind them.
host_list_files · openbot found in code, not yet checked
List files in a host folder this person granted to this Bot. First call host_list_folders for grantId values.
shell · shin-watcher-oss found in code, not yet checked
Run a shell command in the cloned BerriAI/litellm working tree. Use this for git, uv, curl, ls, cat, pytest, etc.
Labels are the instruments' verdict and are never changed by ranking. Agents and robots get this same answer as JSON at /api/v1/find?q=…&answer=1 and through the MCP server.