Reply.io MCP Server

Connect Reply.io to your AI client and let it work across your team and workspace.
reply.io · Documentation

Overview

A remote MCP server at mcp.reply.io that lets MCP-compatible AI clients — Claude, ChatGPT, Cursor, Codex, and more — work with your Reply.io CRM and AI SDR. One connection gives an agent a catalog of tools spanning contacts, sequences, inbox, tasks, analytics, and the AI SDR ("Jason"), so it can read and act on Reply data without making direct HTTP requests. The tools run the same logic as the Reply.io API and the in-app AI assistant.

No local installation required. Free for all Reply.io users.

📖 Full documentation: docs.reply.io/reply-mcp

Where this fits

Reply's agentic toolkit is three pieces. They are complementary, not alternatives:

	What it is	When you want it
reply CLI	`npm i -g reply-cli` — authenticated access to every v3 endpoint via `reply api`	Your agent has a shell. This is the complete surface.
Reply MCP (this repo)	A curated tool catalog over `mcp.reply.io`	Your client speaks MCP and has no shell — desktop apps, hosted assistants.
reply-skills	Outbound expertise as markdown skills: what to do, in what order, with what guardrails	Your agent knows how to call things but not what to run.

MCP gives your agent tools. Skills give it judgement. Most setups want both; a shell-capable agent can do everything through the CLI alone.

The shortest path that works: install the CLI, reply auth login, reply skills install, then talk to your agent in plain words. MCP is optional — add it when your client has no shell.

Connect

Reply MCP is a remote server at https://mcp.reply.io. Authenticate with a scoped personal API key (recommended) or OAuth, then add it to your client.

Claude Code

Terminal

claude mcp add --transport http reply-mcp https://mcp.reply.io \
  --header "Authorization: Bearer usk_...your_key..."

Desktop apps (Claude, ChatGPT)

Add Reply MCP as a remote / custom connector using the URL https://mcp.reply.io and authorize with OAuth.

Create and scope a key under Settings → API Key in your Reply.io dashboard.

Note: Passing credentials in the URL (for example ?api_key=...) is not supported. Always authenticate with the Authorization header or OAuth.

Full connection guide (Codex, mcp-remote proxy, OAuth): docs.reply.io/reply-mcp#connect
Authentication & keys: docs.reply.io/reply-mcp#authentication

Authentication & scopes

Reply MCP authenticates as a single Reply.io user, via one of two methods:

Personal API key (recommended) — passed as Authorization: Bearer <token>. A personal key is scoped: you grant it only the permissions your agent needs, and it can call only the tools those permissions cover.
OAuth — authorize directly from the client, no key to copy. OAuth grants the full tool catalog (all scopes).

Each tool requires a single scope such as contacts:read or sequences:operate; a key can call a tool only if it holds that scope. Act-on-behalf keys (Team and Organization keys) are not supported on this single-user connection.

See the full scope list at docs.reply.io/api-reference/authentication#scopes.

Tools

71 tools across your CRM and AI SDR. ⚠️ marks destructive tools (create / update / delete / send / assign) — these require the matching :write or :operate scope and carry a destructiveHint so conforming clients can prompt for confirmation. Call arguments (the JSON input schema) are advertised live via tools/list; the tables below describe what each tool is for.

Contacts & lists

Tool	Purpose
`reply_search_contacts`	Look up contacts by exact email or LinkedIn URL
`reply_filter_contacts`	List contacts by list/sequence membership or a name/email/company search
`reply_get_contact_activity`	Get a contact's activity history (emails, LinkedIn, calls, events)
⚠️ `reply_create_contact`	Create a contact
⚠️ `reply_update_contact`	Patch fields on an existing contact
⚠️ `reply_change_contact_owner`	Reassign contacts to another team member
⚠️ `reply_mark_contacts_as_replied`	Flag/unflag contacts as replied (stops automated outreach)
⚠️ `reply_blacklist_contact`	Blacklist a contact's email or whole domain
`reply_search_lists`	Resolve contact lists to their numeric IDs by name

Sequences

Tool	Purpose
`reply_search_sequences`	Find sequences by name, status, or archive state
`reply_list_schedules`	List sending schedules (business-hours windows)
`reply_get_sequence_steps`	Get a sequence's ordered steps (type, delay, variant count)
`reply_get_sequence_step_variants`	Get a step's A/B content variants
⚠️ `reply_change_status_in_sequence`	Set a contact's status within a sequence
⚠️ `reply_add_contact_to_sequence`	Enroll contacts into a sequence
⚠️ `reply_start_sequence`	Start or resume a sequence
⚠️ `reply_pause_sequence`	Pause a sequence
⚠️ `reply_assign_email_account_to_sequence`	Attach an email account (mailbox) to a sequence
⚠️ `reply_assign_linkedin_account_to_sequence`	Attach a LinkedIn account to a sequence
⚠️ `reply_assign_schedule_to_sequence`	Set a sequence's sending schedule

Analytics

Tool	Purpose
`reply_get_sequence_stats`	Email + LinkedIn performance for one sequence, over any date range
`reply_compare_sequence_performance`	Compare performance across multiple sequences side by side

Inbox

Tool	Purpose
`reply_get_inbox_emails`	List inbox threads (email + LinkedIn) with short previews
⚠️ `reply_send_inbox_reply`	Send a reply on an existing inbox thread
⚠️ `reply_change_inbox_category`	Set or clear a thread's category

Tasks

Tool	Purpose
`reply_list_my_tasks`	List your tasks, filtered by type, status, due window, or contact
⚠️ `reply_create_task`	Create a manual task
⚠️ `reply_complete_task`	Mark a task as completed

Channels & accounts

Tool	Purpose
`reply_list_email_accounts`	List workspace email accounts (status, daily limit, tags)
`reply_list_linkedin_accounts`	List connected LinkedIn accounts (status, health, tier)

Team

Tool	Purpose
`reply_search_team_members`	Resolve teammates to their numeric user IDs by name or email

Help & workspace

Tool	Purpose
`reply_diagnose`	Explain why a sequence isn't sending and how to fix it
`reply_get_app_map`	Catalog of Reply.io app areas and what the assistant can do in each
`reply_search_knowledge_base`	Search the Reply.io Help Center for how-to answers
`reply_get_knowledge_base_article`	Read a full Help Center article by slug
`reply_report_unsupported_request`	Report a missing capability to the product team

AI SDR — Offers

Tool	Purpose
`reply_list_offers`	List AI SDR offers (what Jason can pitch)
`reply_get_offer`	Get one offer in full
⚠️ `reply_create_offer`	Create a new offer
⚠️ `reply_update_offer`	Patch an existing offer
⚠️ `reply_attach_offer_to_sequence`	Attach an offer to an AI SDR sequence
`reply_generate_offer_from_website`	Draft offer content from a company website (review only, saves nothing)

AI SDR — Playbooks

Tool	Purpose
`reply_list_playbooks`	List playbooks (named sets of selling instructions)
`reply_get_playbook`	Get one playbook in full
⚠️ `reply_create_playbook`	Create a new playbook
⚠️ `reply_update_playbook`	Patch an existing playbook
⚠️ `reply_duplicate_playbook`	Duplicate a playbook
⚠️ `reply_attach_playbook_to_sequence`	Attach a playbook to an AI SDR sequence

AI SDR — Knowledge bases

Tool	Purpose
`reply_list_knowledge_bases`	List AI SDR knowledge bases
`reply_get_knowledge_base`	Get one knowledge base in full (with URL sources)
⚠️ `reply_create_knowledge_base`	Create a knowledge base
⚠️ `reply_update_knowledge_base`	Rename or set a knowledge base's instructions
⚠️ `reply_add_knowledge_base_source`	Add a web-page URL as a source
⚠️ `reply_delete_knowledge_base_source`	Remove a URL source
⚠️ `reply_attach_knowledge_base_to_sequence`	Attach a knowledge base to an AI SDR sequence

AI SDR — Reply handlers

Tool	Purpose
`reply_list_reply_handlers`	List reply handlers in a knowledge base
`reply_get_reply_handler`	Get one reply handler in full
⚠️ `reply_create_reply_handler`	Add a reply handler (how Jason answers a kind of question)
⚠️ `reply_update_reply_handler`	Patch a reply handler
⚠️ `reply_delete_reply_handler`	Remove a reply handler

AI SDR — Re-engagement cards

Tool	Purpose
`reply_list_reengagement_cards`	List re-engagement cards in a knowledge base
`reply_get_reengagement_card`	Get one re-engagement card in full
⚠️ `reply_create_reengagement_card`	Add a re-engagement card (how Jason wins back a quiet prospect)
⚠️ `reply_update_reengagement_card`	Patch a re-engagement card
⚠️ `reply_delete_reengagement_card`	Remove a re-engagement card

AI SDR — Approvals & reply mode

Tool	Purpose
`reply_list_pending_approvals`	List AI SDR draft messages waiting for approval
⚠️ `reply_approve_message`	Approve a draft and send it immediately
⚠️ `reply_bulk_approve_messages`	Approve and send multiple drafts at once (atomic)
⚠️ `reply_regenerate_message`	Ask the AI SDR to rewrite a pending draft
⚠️ `reply_reject_message`	Reject a draft and remove the contact from that sequence
⚠️ `reply_set_sequence_reply_mode`	Switch a sequence between Review and Autonomous reply mode

Example prompts

Once connected, you can ask your AI assistant things like:

"List my active sequences and how each is performing."
"Add john@acme.com to the Demo Follow-up sequence."
"Pause the Cold Outreach sequence — we're updating the copy."
"Why isn't my Q2 Launch sequence sending?"
"Show me the AI SDR drafts waiting for approval and approve the good ones."
"Compare step-by-step performance for my top two sequences."
"Create an offer for our new onboarding service and attach it to the Q3 sequence."

Learn more

Reply MCP documentation — capabilities, authentication, and connection guide.
Connecting Reply MCP to your AI model — Help Center walkthrough.
Reply MCP overview
reply CLI — the same Reply.io surface from a terminal, including every v3 endpoint via reply api.
reply-skills — outbound expertise as installable skill packs for your agent.
agents.reply.io — how the CLI, MCP and the skills fit together, and which interface to pick.

License

MIT — see LICENSE.