reply-io

name

reply-io

description

Reply.io enables sales and marketing teams to automate and scale multichannel outreach by orchestrating personalized sequences via email, LinkedIn, SMS, calls, and WhatsApp. It incorporates AI-generated messages, integrates with CRMs and lead databases, automates follow-ups and meeting scheduling, and offers performance analytics to fuel lead generation and revenue growth. Read and write Reply.io data through One: people, webhooks, schedules, campaigns, customfields, campaignsteps and more, 75 actions with real parameter documentation. Use whenever the user asks to look something up in Reply.io, create or update a record there, or build code against the Reply.io API.

Reply.io through One

Reply.io enables sales and marketing teams to automate and scale multichannel outreach by orchestrating personalized sequences via email, LinkedIn, SMS, calls, and WhatsApp. It incorporates AI-generated messages, integrates with CRMs and lead databases, automates follow-ups and meeting scheduling, and offers performance analytics to fuel lead generation and revenue growth.

One exposes Reply.io through four MCP tools. The table below carries real action ids from One's knowledge base, so for a common operation you can skip search and go straight to reading the action's parameters.

How to run an action

1. Find the action in the table below, or call search_one_platform_actions with platform reply-io if it is not listed.
2. Call get_one_action_knowledge with the action id. Do this every time, including for actions in this table. The table gives you the id, not the parameters.
3. Call execute_one_action with parameters copied from that knowledge.

Never guess a parameter name, a body field, or an enum value. The knowledge has the real schema, and a guessed field is either a 400 or a silent write of the wrong thing.

Before you start

Call list_one_integrations once and confirm Reply.io is connected. If it is missing, the user has not connected it: say so and point them at https://app.withone.ai rather than reaching for raw HTTP.

Each connection carries an access field. If it reports {"policy": "methods", "methods": ["GET"]} the agent is read-only here, so plan a read-only answer instead of attempting a write that will be refused.

Before a write

Creates, updates, deletes and sends land on a real Reply.io account and cannot be recalled. State the action and the specific target in one line before the first write in a task, and let the user stop you. Reads need no confirmation.

Actions

People

Action	Method	Path	Action id
Get Contacts in a List (by List ID)	GET	/v1/people/list/{{listId}}	conn_mod_def::GJ6N1e1LrM8::OXVdkROKRXaMLJX44wQFQA
Get Contacts in a List (by List Name)	GET	/people/list	conn_mod_def::GJ6N1wiksPM::5n2C7YYuTFe_ykeuDe1y9g
List Contacts (People)	GET	/people	conn_mod_def::GJ6N1TPuyaU::wpSt7_ZUTna3QKyQmMlqaQ
Create or Update a Contact	POST	/people	conn_mod_def::GJ6N07wC1rI::RIBLi74jRcCLfDJdaXzRrQ
Delete a Contact	DELETE	/v1/people/	conn_mod_def::GJ6N1EBWDUs::k496jgd2TVOD__5nTO_7KA
Import Contacts (Schedules Embedded)	POST	/v1/people/import/schedules-embedded	conn_mod_def::GJ6N2L9-Ds8::P0Sc5myKTM6WFhTw-NOaow
Look Up a Prospect ID by Email or LinkedIn	POST	/people/lookup	conn_mod_def::GJ6N2KNuIiE::XsNzVjqaTEK9Dw_6Gq9Rkw

Webhooks

Action	Method	Path	Action id
Get a Webhook Subscription by ID	GET	/api/v2/webhooks/{{webhookId}}	conn_mod_def::GJ6N3H9DCto::nYe9iN6wSWWbUYxTzFme9Q
List Webhook Subscriptions	GET	/api/v2/webhooks	conn_mod_def::GJ6OJgj7xOk::0MdflAEBQkqMQStYS8Qn6w
Add a Webhook Subscription	POST	/api/v2/webhooks	conn_mod_def::GJ6N2rcMOFM::20QFFTiMRBq2086-oqFgCw
Delete a Webhook Subscription	DELETE	/api/v2/webhooks/{{webhookId}}	conn_mod_def::GJ6N22r1fyE::HYFdyMlpQ56Ynk94T2o--Q
Test a Webhook by Event Type and URL	POST	/api/v2/webhooks/test	conn_mod_def::GJ6N346SZbQ::mzTWpxBKSA6_uE9u7DesFA
Test a Webhook Subscription by ID	POST	/api/v2/webhooks/{{subsriptionId}}/test	conn_mod_def::GJ6N37fWWsQ::4nh9D9HwSYyNDqv5-fwP0Q
Update a Webhook Subscription	PUT	/api/v2/webhooks/{{webhookId}}	conn_mod_def::GJ6N330oIA8::eWwubKWaS0-G5Graed_91Q

Schedules

Action	Method	Path	Action id
Get a Schedule by ID	GET	/v2/schedules/{{id}}	conn_mod_def::GJ6N3xAv1oo::6fIHAEwtQ9-Ie0qIDC1K0Q
Get Default Campaign Schedule for the Authenticated User	GET	/schedules/default	conn_mod_def::GJ6N1-J48jg::OOTWetZuQpOPkuLTIewDMA
List All Campaign Schedules	GET	/schedules	conn_mod_def::GJ6N2Cxw3Oo::O8rXqXr_SaSVbi5Vzyj3qQ
Create Schedule	POST	/schedules	conn_mod_def::GJ6N23ODocc::u6bdMOoTSSK8AraJ7NT16g
Delete a Schedule by ID	DELETE	/v2/schedules/{{id}}	conn_mod_def::GJ6N29ZAbIs::-YiPPggrQcyVouo96WEhZA
Set a Schedule as Default by ID	POST	/v2/schedules/{{id}}/set-default	conn_mod_def::GJ6N3sFQLA8::jWbHOUr_TMSSe-HBbZeQIg

Campaigns

Action	Method	Path	Action id
Get Campaign Details by Name (or ID)	GET	/campaigns	conn_mod_def::GJ6N1Wst0qU::mmHA4l8hTDGSAPvenfu9gA
Archive a Campaign	POST	/v2/campaigns/{{campaignId}}/archive	conn_mod_def::GJ6N2vPOWbY::QhbwLynyRzmALxIw7ORXTg
Create Campaign (Custom Step Text)	POST	/campaigns	conn_mod_def::GJ6N2213KJk::_Ftbs6XsTT-1OuCfor1Zzw
Pause a Campaign	POST	/campaigns/{{campaignId}}/pause	conn_mod_def::GJ6N3Q17VDs::IalbEeDGS7ysRTPnz4DkVg
Start a Campaign	POST	/v2/campaigns/{{campaignId}}/start	conn_mod_def::GJ6N3rckk4k::RCkLRF32SCSe9PYrpoN6aQ
Update a Campaign’s Settings	PATCH	/v2/campaigns/{{campaignId}}	conn_mod_def::GJ6N3417MHk::cgwYZDhwQIa2-iZAz4qzYw

CustomFields

Action	Method	Path	Action id
Get a Custom Field by ID	GET	/v1/custom-fields/{{id}}	conn_mod_def::GJ6N12jdSVg::0IK6gmjuRRmNvbZCtaqr0g
List All Custom Fields	GET	/custom-fields/all	conn_mod_def::GJ6N1vifZ_g::roPHskemTfOI_Kc_SLotvg
Add a New Custom Field	POST	/custom-fields	conn_mod_def::GJ6N04CfsfA::hsyHGMghSiuDTTteKDM2xQ
Delete a Custom Field	DELETE	/v1/custom-fields/{{id}}	conn_mod_def::GJ6N1GtbwDw::Na-dghyrSmigW9s12Q28KA
Update a Custom Field	PUT	/custom-fields/{{id}}	conn_mod_def::GJ6N2d0Y0n8::ghcuXsZKQa-B75peI_3Z3Q

CampaignSteps

Action	Method	Path	Action id
Get a Campaign’s Step by ID	GET	/v2/campaigns/{{campaignId}}/steps/{{campaignStepId}}	conn_mod_def::GJ6N3EtMOdc::cAsbB2z6TwOubqVUOmI9IA
List a Campaign’s Steps	GET	/v2/campaigns/{{campaignId}}/steps	conn_mod_def::GJ6N3QqhDOE::LdRaXB_9S1CDL8gtK8Ew7w
Add a Step to a Campaign	POST	/v2/campaigns/{{campaignId}}/steps	conn_mod_def::GJ6N2qw6Leg::H9z98aiGT6utXfmDIEPP9A
Delete a Campaign Step	DELETE	/v2/campaigns/{{campaignId}}/steps/{{campaignStepId}}	conn_mod_def::GJ6N2280Ips::dXT7oxw3To2NPDxnFxe4Eg
Update a Campaign’s Step	PATCH	/v2/campaigns/{{campaignId}}/steps/{{campaignStepId}}	conn_mod_def::GJ6N34ci49E::Xx0bv5HGRqePQmaZe5VSQw

PeopleLists

Action	Method	Path	Action id
Get a People List by ID	GET	/v1/people/lists/{{listId}}	conn_mod_def::GJ6N1vtjre4::wRmU6v98T8uFmfd2vzDEKA
Get All People Lists	GET	/people/lists	conn_mod_def::GJ6N1U93jnE::QbUtDOhiSEWhQOeiisIPzA
Create a People List	POST	/people/lists	conn_mod_def::GJ6N1HxQqMk::lvPaCkqYQ6-6GcenV3uJFw
Delete a List by ID	DELETE	/people/lists/{{listId}}	conn_mod_def::GJ6N1URvc7Y::z6c7IEmmTfWjkKq8JNY-4Q

Actions

Action	Method	Path	Action id
Bulk Push Contacts to a Sequence	POST	/Actions/pushContactsToSequence	conn_mod_def::GJ6N03rxkLY::D5QETsIFS5yLLssjPRD02w
Mark a Contact as Replied (by Email)	POST	/actions/markasreplied	conn_mod_def::GJ6N2WtcbSs::ZoOhVXimRR-W7N_Hm11j-A
Move Contacts to Lists	POST	/Actions/moveContactsToLists	conn_mod_def::GJ6N2T1XsmY::0lIVSPfhSJmv_dgH4vldQw
Remove a Contact from All Sequences	POST	/actions/removepersonfromallcampaigns	conn_mod_def::GJ6N2Wum_uE::0c1TeR_xT56qxyf8JaFXRQ

Contacts

Action	Method	Path	Action id
List Contacts With Stage Changes	GET	/Contacts/prospects-by-status-changes	conn_mod_def::GJ6N1-5briw::-cB5ga1xQpWa2XhSPc8TTg
Create and Push Contact to a Campaign Sequence	POST	/actions/addandpushtocampaign	conn_mod_def::GJ6N1EFzuIE::gEcRoVfqSGyPxrwd72Y4DQ
Mark a Contact as Finished (by Email)	POST	/v1/actions/markasfinished	conn_mod_def::GJ6N2T68eaI::4MxJiWA-QEqfkKTRSEE_9Q
Unmark a Contact as Out of Office	POST	/actions/unmark-as-out-of-office	conn_mod_def::GJ6N2eHdy20::giHA18zgSR2nrhfpoYcK-Q

EmailAccounts

Action	Method	Path	Action id
List Email Accounts	GET	/emailAccounts	conn_mod_def::GJ6N2JzwtrE::JPT3b5F8Q3eDJE4yrh68HA
Add New Email Account	POST	/EmailAccounts	conn_mod_def::GJ6N07vWr6g::jtiSsMZDTfiinwWVFSRtHg
Delete an Email Account	DELETE	/EmailAccounts	conn_mod_def::GJ6N1KdFJlQ::PPyjp8kuSkmK_gNe_9_BqA

Stats

Action	Method	Path	Action id
Get a Contact’s Status in a Campaign	GET	/stats/status_in_campaign	conn_mod_def::GJ6N1eW1qDg::VMvr4bneT5GSdwaGD9bs_g
Get Campaign Click Statistics	GET	/v1/Stats/CampaignClicks	conn_mod_def::GJ6N1SbdAOU::Y2slLmMGQo6xxwgWInl9wA
Get Campaign Statistics (People Sent) for a Campaign	GET	/v1/stats/GetPeopleSentPerCampaign	conn_mod_def::GJ6N1fH1SSU::W47We6KUTravpbO93ls6DA

Blacklist

Action	Method	Path	Action id
List All Blacklisted Domains and Emails	GET	/Blacklist	conn_mod_def::GJ6N1-n-3u0::Ud-aW6lpRGGmGElsrca21w
Add a Domain or Email to the Blacklist	POST	/Blacklist	conn_mod_def::GJ6N04LRKUw::xGyBU4J0THONG7dxNvGrsg
Remove a Domain or Email from the Blacklist	DELETE	/v1/Blacklist	conn_mod_def::GJ6N2i_rwbc::fgLVuLzlRkqnl7egokBPjA

BrandedLinks

Action	Method	Path	Action id
Add a Branded Link (Match Sending Domain)	POST	/api/v2/branded-links	conn_mod_def::GJ6N2q9DUTU::ebEEzXsLSqu_CpWZ4mYR9A
Change a Branded Link’s Active State	PUT	/api/v2/branded-links/{{brankedLinkId}}/active	conn_mod_def::GJ6N2qyZo-w::YlS4Z9qiQZeUNfECiXj9-g

Emails

Action	Method	Path	Action id
Get an Email Message’s Content	GET	/api/v2/emails/{{emailMessageId}}/content	conn_mod_def::GJ6N3JfWBjw::mUTFczKJS0ydgLYKqX2dOA
Send Test Email	POST	/emails/test	conn_mod_def::GJ6N3sB8kzU::KimCuOp1S9qQsmT-tRA8dQ

Reports

Action	Method	Path	Action id
Download a Generated Email Report	GET	/api/v2/reports/download	conn_mod_def::GJ6N3Qu8LW4::Ti5ekS5eTcqRIGZPhtBNBg
Generate Email Report (Get Report URL)	GET	/api/v2/reports/generate-email-report	conn_mod_def::GJ6N3FXv7Gw::2R12LcsXTXub9UdRjMXU2A

CampaignContacts

Action	Method	Path	Action id
Push Contact to a Campaign (Sequence)	POST	/actions/pushtocampaign	conn_mod_def::GJ6N2Td0qGY::aJAUG7F8QDujm5M1bMPnHw
Remove a Contact from a Campaign (Sequence)	POST	/actions/removepersonfromcampaignbyid	conn_mod_def::GJ6N2fPhcuo::QPx5kxMwSXicGUKNacEjvQ

CampaignStepStatistics

Action	Method	Path	Action id
Get Campaign Step Statistics	GET	/Stats/CampaignStep	conn_mod_def::GJ6N1jT665Q::lexyjxzzTD-CmL8xYRYCTg

SharedPageUrl

Action	Method	Path	Action id
Get Email Account Shared Page URL	GET	/SharedPageUrl	conn_mod_def::GJ6N1094zWE::1iuVBdSNRc2a8AkkibVKPQ

Templates

Action	Method	Path	Action id
Get a Template by ID	GET	/templates	conn_mod_def::GJ6N2MSdwIw::E89PucLpQNuGHC92tCeLew

Accounts

Action	Method	Path	Action id
Import Prospect Accounts from CSV (API Import)	POST	/accounts/import	conn_mod_def::GJ6N2MDUdoo::xRfX4V4XQDaPkrUw9LZh7A

ContactStatistics

Action	Method	Path	Action id
Get Contact Statistics	GET	/v1/stats/person	conn_mod_def::GJ6OJj7uov8::hN8pgzVoQqy_gioBP17PTg

Sequences

Action	Method	Path	Action id
List Campaigns (Sequences) for a Contact	GET	/v1/people/{{contactId}}/sequences	conn_mod_def::GJ6N1-SBMro::aZK3z0GaTKiIeBbez1I6mQ

CampaignEmailStepVariants

Action	Method	Path	Action id
Activate or Pause a Campaign Email Step Variant	POST	/v2/campaigns/{{campaignStepId}}/variants/toggle	conn_mod_def::GJ6N2fTgGOg::iFuxAvLEQHqafg_bVuu00g

WebhookLogs

Action	Method	Path	Action id
Get a Webhook Subscription’s Error Logs	GET	/api/v2/webhooks/{{webhookId}}/logs	conn_mod_def::GJ6N3SpHQag::rJKDn3MqSbSgb7tfJwm3PQ

BillingInfo

Action	Method	Path	Action id
Get Billing Info	GET	/billing/info	conn_mod_def::GJ6N3JUU49w::yDfmZ-APQtuDjjkENR5xzQ

Prospects

Action	Method	Path	Action id
Send Direct Email to a Prospect	POST	/v2/prospects/{{prospectid}}/emails	conn_mod_def::GJ6N3rwK2kc::9e34cCiyRXyswipnwtLuzg

When a call fails

The error comes from Reply.io, not from One. A 400 or 422 means your parameters do not match the schema, so re-read the knowledge and fix the field. A 401 or 403 means the connection needs re-authorizing, which no retry will fix. A 404 means the id is not on this account. A 429 means slow down. Never retry a write more than once: the first attempt may have landed.

Full catalog: https://www.withone.ai/knowledge/reply-io

Integration knowledge by One (withone.ai), licensed under One-Knowledge-1.0. Attribution must be preserved in derivative works.