--- title: "JustCall MCP server for AI agents - actionlake" description: "Give Claude 100 JustCall actions through one MCP server: sales dialer contacts, text groups. Your agent never holds the credential. 100,000 calls a month free." canonical: https://actionlake.com/connectors/justcall updated: 2026-10-23 --- Connectors · Email & messaging # JustCall MCP server for AI agents. actionlake is an MCP gateway: one remote MCP server that connects Claude and other MCP clients to JustCall and the rest of your systems. It gives your agent 100 JustCall actions (56 reads, 33 writes and 11 that wait for a confirmation) and holds the JustCall credential itself, so the agent never does. It paces JustCall's limits and records every call. [Connect JustCall free](https://actionlake.com/console?start=sandbox) [See pricing](https://actionlake.com/pricing) 100,000 free calls a month. No card, no email, no password: press Start a free sandbox on the next screen and keep the key it shows you. `claude mcp add --transport http actionlake https://connect.actionlake.com/mcp` the first call ``` do { action: "justcall.users.list", intent: "check which JustCall account is connected" } # List all users · read · 1 upstream call ``` - 100 actions in one signed file - 56 read look, never change - 33 write create and update - 11 wait for a yes destructive, confirmed first Set up ## Connect JustCall in three steps. 1. 01 ### Add actionlake to Claude. Run the command once in Claude Code; its consent page can create a free sandbox: 100,000 calls a month, no card. In the Claude app, add a custom connector with the URL below and paste your key on the consent page. Creating a new sandbox from the Claude app is not yet tested by us. `https://connect.actionlake.com/mcp` 2. 02 ### Connect JustCall. API key. No consent screen: your agent can connect it for you, but the key then passes through your chat. To keep it out of the model's context, paste it in the console instead. actionlake stores what you paste write-only, sealed under your tenant's key. - `api_key` JustCall API key (Profile > APIs and Webhooks) - `api_secret` JustCall API secret (Profile > APIs and Webhooks) ``` account { op: "connections.requirements", service: "justcall" } # free: exactly what to paste, and what is found for you ``` 3. 03 ### Make the first call. Check before a write. Ask in plain words; Claude picks the action. Before anything changes, `check` validates the call and prices it, for free. ``` do { action: "justcall.users.list" } # list all users · read · 1 upstream call check { action: "justcall.texts.send", input: { … } } # free: inputs, permissions, cost and confirmations, nothing sent ``` JustCall at a glance **Sign-in** API key. No consent screen: your agent can connect it for you, but the key then passes through your chat. To keep it out of the model's context, paste it in the console instead. **You provide** `api_key` `api_secret` **Limits we pace to** 30 calls a minute, per connection **API covered** JustCall (cloud phone: calls, SMS/MMS, WhatsApp, RCS, contacts, Sales Dialer, JustCall AI) API v2.1`api.justcall.io` **Built from** JustCall's documentation, read 23 October 2026[developer.justcall.io](https://developer.justcall.io/llms.txt%20(per-operation%20OpenAPI%20blocks%20in%20reference/*.md)) [developer.justcall.io](https://developer.justcall.io/reference/authentication) **Service file** Version 1.0.0, signed (Ed25519) **Cached reads** 56 of 56 reads, for up to 5 minutes; a write clears what it affects **Shared entities** 4, so ask can line JustCall up with your other systems **Data** Processed and stored in Sydney, Australia. No US region yet Capabilities ## What an AI agent can do in JustCall. 100 actions in 25 areas. Every one carries its effect, so a key can allow the reads and hold the rest. - **56** read look, never change - **33** write create and update - **11** destructive wait for a confirmation 1. ### Sales dialer contacts 9 4 read · 4 write · 1 destructive Bulk Add Contacts to DNCA · Bulk import contacts · Create contact · List all contacts 2. ### Text groups 9 4 read · 3 write · 2 destructive Create a group · List all groups · List group messages · Send message in a group 3. ### Contacts 8 3 read · 4 write · 1 destructive List all contacts · Create contact · Get a contact · Update contact 4. ### Sales dialer campaigns 7 3 read · 3 write · 1 destructive Add contact to a campaign · Create campaign · List all campaigns · List campaign contacts 5. ### User groups 7 2 read · 3 write · 2 destructive List all user groups · Create a user group · Get a user group · Update a user group 6. ### Calls 5 4 read · 1 write · 0 destructive List all calls · Get a call · Update a call · Get call journey 7. ### RCS templates 5 1 read · 4 write · 0 destructive Create a card template · Create a carousel template · Create a media template · Create a text template 8. ### Special dates 5 2 read · 2 write · 1 destructive Create a special date · List all special dates · Get a special date · Update a special date **17 more areas · 45 actions** - Text tags **4** - Text threads **4** - Texts **4** - Whatsapp messages **4** - Appointments **3** - Call analytics **3** - Phone numbers **3** - RCS messages **3** - Users **3** - Webhooks **3** - Calls AI **2** - Meetings AI **2** - Sales dialer calls **2** - Voice agents **2** - RCS phones **1** - Sales dialer analytics **1** - Whatsapp templates **1** Top actions ## The JustCall API, shaped for agents. The ids your agent types, what each does, and the one name it shares with other systems. 19 of JustCall's 19 action names are shared with at least one other connector, so an agent learns them once. | Action | What it does | Effect | Same name in | | --- | --- | --- | --- | | `justcall.users.list` List all users | Utilize this endpoint to fetch a list of all the users added to your JustCall account and to filter a set of users via the query parameters. | read | `identity.user.list` 474 connectors | | `justcall.calls.list` List all calls | Retrieve all calls linked to an account or refine the call selection as needed by utilizing the numerous query parameter fields. | read | `comm.call.list` 44 connectors | | `justcall.texts.list` List all texts | Retrieve all text messages linked to an account or refine the message selection as needed by utilizing the various query parameter fields. | read | `comm.sms.list` 19 connectors | | `justcall.contacts.list` List all contacts | Retrieve all contacts present in your account or filter the contacts based on one or more query parameters. | read | `crm.contact.list` 177 connectors | | `justcall.users.get` Get a user | Get data for a specific user using this endpoint by sending their id (agent_id can be found via the List all users API). | read | `identity.user.get` 399 connectors | | `justcall.texts.send` Send SMS/MMS | Utilize this endpoint to send SMS messages via the JustCall API and leverage it for setting up SMS automation's in a third-party tool as well. | write | `comm.sms.send` 26 connectors | | `justcall.calls.get` Get a call | Utilize this endpoint for retrieval of data for a Call, including details such as duration, direction, status, timestamps, notes, and dispositions. | read | `comm.call.get` 40 connectors | | `justcall.contacts.create` Create contact | Utilize this endpoint to add a new contact to JustCall’s ‘Contacts’ section. | write | `crm.contact.create` 161 connectors | | `justcall.contacts.delete` Delete contact | Utilize this endpoint to delete a specific contact from your JustCall account using the ‘id’ or the ‘contact_number’ of the contact. | destructive | `crm.contact.delete` 147 connectors | | `justcall.user_groups.list` List all user groups | Utilize this endpoint to fetch a list of all the user groups added to your JustCall account and to filter a set of user groups via the query parameters. | read | `identity.group.list` 262 connectors | | `justcall.user_groups.create` Create a user group | Create a user group using this endpoint by sending the group name, extension and member ids. | write | `identity.group.create` 205 connectors | | `justcall.texts.check_reply` Check reply | Check the response for a specific SMS sent to a user by providing the contact's phone number and, optionally, the JustCall number. | read | this connector | Try it ## Prompts to paste into Claude. Each one names the JustCall actions it will call, so you know what it reads and what it changes before you send it. 1. Read read Find the JustCall contacts with no email address, so we can clean them up. calls `justcall.contacts.list` 2. Write write Send SMS/MMS in JustCall. Show me exactly what you will send before you save it. calls `justcall.texts.send` 3. Across systems read Which contacts are in both JustCall and HaloPSA, and how many are in only one of them? calls `justcall.contacts.list` `halopsa.users.list` Across your systems ## JustCall, joined to the rest of your business. One `ask` fetches from JustCall and another system, joins the rows on the same customer on our side, and hands your agent the answer, not every row. - Which contacts are in both JustCall and HaloPSA, and how many are in only one of them? `justcall.contacts.list` + `halopsa.users.list`, on `crm.contact` · [HaloPSA](https://actionlake.com/connectors/halopsa) - Which contacts are in both JustCall and NetSuite, and how many are in only one of them? `justcall.contacts.list` + `netsuite.views.contacts`, on `crm.contact` · [NetSuite](https://actionlake.com/connectors/netsuite) Also mapped by other connectors `identity.user` **517** `crm.contact` **192** `comm.call` **33** `comm.sms` **8** ask ``` ask { intent: "which contacts are in both JustCall and HaloPSA, and how many are in only one of them", steps: [ { action: "justcall.contacts.list", as: "people", input: {}, limit: 100, max_pages: 5 }, { action: "halopsa.users.list", as: "people2", input: {}, limit: 100, max_pages: 5 }, { join: { left: "people", right: "people2", on: "crm.contact", group_by: "people.email", select: ["people.email", "count(people2.id) as in_halopsa"] } } ] } ``` Example. Run it through check first: it validates the steps and prices them, and it is free. Governance for JustCall ## Destructive actions wait for a yes. 11 JustCall actions are destructive. These are all of them: - Delete contact `justcall.contacts.delete` - Delete a user group `justcall.user_groups.delete` - Delete a tag `justcall.text_tags.delete` - Delete a group `justcall.text_groups.delete` - Remove URL from webhook `justcall.webhooks.delete_url` - Delete a special date `justcall.special_dates.delete` - Remove tag from thread `justcall.text_threads.remove_tag` - Remove members from a group `justcall.text_groups.remove_members` - Remove members from a user group `justcall.user_groups.remove_members` - Delete contact `justcall.sales_dialer_contacts.delete` - Remove contact from a campaign `justcall.sales_dialer_campaigns.remove_contact` A destructive action runs only with `confirm: true`. Under the `human` policy the agent cannot confirm for itself: the run stops until a named person approves, in the console or from a signed link in an email. The cap on a key is refused before the call is sent, never after. do justcall.contacts.delete confirm_policy: **human** Delete contact? **intent:** the user asked me to delete contact run suspended · waiting for a named person · key _justcall-agent_ cannot confirm itself In the console, or from an emailed signed link. a key for this connector ``` account { op: "keys.create", name: "justcall-agent", allowed_actions: ["justcall.*"], cap_calls: 2000, confirm_policy: "human_for_writes", approval_rules: [ { match: "justcall.contacts.delete", approver: "lead@example.com" }, { match: "justcall.user_groups.delete", approver: "lead@example.com" }, { match: "justcall.text_tags.delete", approver: "lead@example.com" } ] } ``` Illustrative. Scoped to JustCall only, capped at 2,000 upstream calls, every write confirmed, and the destructive ones approved by a named person. Cost ## What JustCall costs on actionlake. Every JustCall action is one upstream call, the only thing actionlake bills. Searching, `check`, `cost`, `account` and any call JustCall refused with 401, 403, 429 or a 5xx are free. Paid plans start at US$49 a month for 250,000 calls, with overage from US$0.30 down to US$0.18 per 1,000. - 1 upstream call per action all 100 JustCall actions - 23 actions page each page of a long list is one call - 56 reads can be cached a cache hit costs nothing - 100,000 calls a month, free paid plans from US$49 a month for 250,000 [See pricing](https://actionlake.com/pricing) Action index ## Every JustCall action. 100 actions by area: the id your agent calls, what it does, and its effect. **Sales dialer contacts 9** - `justcall.sales_dialer_contacts.bulk_add_dnca` Bulk Add Contacts to DNCA write - `justcall.sales_dialer_contacts.bulk_import` Bulk import contacts write - `justcall.sales_dialer_contacts.bulk_import_status` Get bulk import status read - `justcall.sales_dialer_contacts.create` Create contact write - `justcall.sales_dialer_contacts.delete` Delete contact destructive - `justcall.sales_dialer_contacts.get` Get a contact read - `justcall.sales_dialer_contacts.list` List all contacts read - `justcall.sales_dialer_contacts.list_custom_fields` List contact custom fields read - `justcall.sales_dialer_contacts.update` Update contact write **Text groups 9** - `justcall.text_groups.add_members` Add members to a group write - `justcall.text_groups.create` Create a group write - `justcall.text_groups.delete` Delete a group destructive - `justcall.text_groups.get` Get a group read - `justcall.text_groups.get_message` Get a group message read - `justcall.text_groups.list` List all groups read - `justcall.text_groups.list_messages` List group messages read - `justcall.text_groups.remove_members` Remove members from a group destructive - `justcall.text_groups.send_message` Send message in a group write **Contacts 8** - `justcall.contacts.bulk_add_to_blacklist` Bulk add contacts to blacklist write - `justcall.contacts.create` Create contact write - `justcall.contacts.delete` Delete contact destructive - `justcall.contacts.get` Get a contact read - `justcall.contacts.list` List all contacts read - `justcall.contacts.list_blacklist` List blacklist contacts read - `justcall.contacts.update` Update contact write - `justcall.contacts.update_status` Update contact status write **Sales dialer campaigns 7** - `justcall.sales_dialer_campaigns.add_contact` Add contact to a campaign write - `justcall.sales_dialer_campaigns.create` Create campaign write - `justcall.sales_dialer_campaigns.get` Get a campaign read - `justcall.sales_dialer_campaigns.list` List all campaigns read - `justcall.sales_dialer_campaigns.list_contacts` List campaign contacts read - `justcall.sales_dialer_campaigns.remove_contact` Remove contact from a campaign destructive - `justcall.sales_dialer_campaigns.update` Update campaign write **User groups 7** - `justcall.user_groups.add_members` Add members to a user group write - `justcall.user_groups.create` Create a user group write - `justcall.user_groups.delete` Delete a user group destructive - `justcall.user_groups.get` Get a user group read - `justcall.user_groups.list` List all user groups read - `justcall.user_groups.remove_members` Remove members from a user group destructive - `justcall.user_groups.update` Update a user group write **Calls 5** - `justcall.calls.get` Get a call read - `justcall.calls.get_journey` Get call journey read - `justcall.calls.get_voice_agent_data` Get voice agent data read - `justcall.calls.list` List all calls read - `justcall.calls.update` Update a call write **RCS templates 5** - `justcall.rcs_templates.create_card` Create a card template write - `justcall.rcs_templates.create_carousel` Create a carousel template write - `justcall.rcs_templates.create_media` Create a media template write - `justcall.rcs_templates.create_text` Create a text template write - `justcall.rcs_templates.list` List all templates read **Special dates 5** - `justcall.special_dates.create` Create a special date write - `justcall.special_dates.delete` Delete a special date destructive - `justcall.special_dates.get` Get a special date read - `justcall.special_dates.list` List all special dates read - `justcall.special_dates.update` Update a special date write **Text tags 4** - `justcall.text_tags.create` Create a tag write - `justcall.text_tags.delete` Delete a tag destructive - `justcall.text_tags.get` Get a tag read - `justcall.text_tags.list` List all tags read **Text threads 4** - `justcall.text_threads.add_tag` Add tag to thread write - `justcall.text_threads.get` Get a thread read - `justcall.text_threads.list` List all threads read - `justcall.text_threads.remove_tag` Remove tag from thread destructive **Texts 4** - `justcall.texts.check_reply` Check reply read - `justcall.texts.get` Get a text read - `justcall.texts.list` List all texts read - `justcall.texts.send` Send SMS/MMS write **Whatsapp messages 4** - `justcall.whatsapp_messages.check_reply` Check message reply read - `justcall.whatsapp_messages.get` Get a message read - `justcall.whatsapp_messages.list` List all messages read - `justcall.whatsapp_messages.send` Send message write **Appointments 3** - `justcall.appointments.available_slots` List available slots read - `justcall.appointments.create` Create an appointment write - `justcall.appointments.get` Get an appointment read **Call analytics 3** - `justcall.call_analytics.account` Account analytics read - `justcall.call_analytics.agent` Agent analytics read - `justcall.call_analytics.number` Number analytics read **Phone numbers 3** - `justcall.phone_numbers.detect` Detect incoming number read - `justcall.phone_numbers.get` Get a phone number read - `justcall.phone_numbers.list` List all phone numbers read **RCS messages 3** - `justcall.rcs_messages.get` Get a message read - `justcall.rcs_messages.list` List all messages read - `justcall.rcs_messages.send` Send message write **Users 3** - `justcall.users.get` Get a user read - `justcall.users.list` List all users read - `justcall.users.update_availability` Update user availability write **Webhooks 3** - `justcall.webhooks.create` Add URL to webhook write - `justcall.webhooks.delete_url` Remove URL from webhook destructive - `justcall.webhooks.list` List subscribed webhooks read **Calls AI 2** - `justcall.calls_ai.get` Get AI data read - `justcall.calls_ai.list` List calls AI data read **Meetings AI 2** - `justcall.meetings_ai.get` Get AI data read - `justcall.meetings_ai.list` List meetings AI data read **Sales dialer calls 2** - `justcall.sales_dialer_calls.get` Get a call read - `justcall.sales_dialer_calls.list` List all calls read **Voice agents 2** - `justcall.voice_agents.initiate_call` Initiate a call write - `justcall.voice_agents.list` List all voice agents read **RCS phones 1** - `justcall.rcs_phones.list` List RCS senders read **Sales dialer analytics 1** - `justcall.sales_dialer_analytics.agent` Agent analytics read **Whatsapp templates 1** - `justcall.whatsapp_templates.list` List all templates read Questions ## The JustCall MCP server, answered. **Is there a JustCall MCP server for Claude?** Yes. actionlake is an MCP gateway: a remote MCP server that gives Claude, or another MCP client, 100 JustCall actions across sales dialer contacts, text groups, contacts and sales dialer campaigns, through the same eight tools it uses for every other connector. actionlake is independent; it is not made or endorsed by JustCall. **What do I need to connect JustCall?** JustCall API key (Profile > APIs and Webhooks) and JustCall API secret (Profile > APIs and Webhooks). The free call account { op: "connections.requirements", service: "justcall" } lists exactly what to paste. **Can an AI agent delete or change things in JustCall?** Only if its key allows it, and only with an explicit confirmation. 11 JustCall actions are destructive, including delete contact, delete a user group and delete a tag. Each runs only with confirm: true. Under the human confirm policy, or an approval rule on the key, the run waits until a named person approves it. **Will an AI agent use up my JustCall API limit?** actionlake paces every call to the limits in the JustCall service file: 30 calls a minute per connection. Repeated reads are answered from cache (56 JustCall actions can be), which never reaches JustCall. **What does a JustCall action cost?** One upstream call, the only unit actionlake bills. A list that pages bills one call per page (23 JustCall actions page). Cache hits, searches, dry runs and calls JustCall refused with 401, 403, 429 or a 5xx are free. The Free plan includes 100,000 calls a month with no card. Paid plans start at US$49 a month for 250,000 calls, with overage from US$0.30 down to US$0.18 per 1,000. **Which JustCall API does it cover?** The JustCall (cloud phone: calls, SMS/MMS, WhatsApp, RCS, contacts, Sales Dialer, JustCall AI) API v2.1 at api.justcall.io. It is built from JustCall's documentation as read on 23 October 2026. 100 actions in 25 areas, each one in the signed service file (version 1.0.0). **Can I combine JustCall with my other systems?** Yes. ask joins JustCall to HaloPSA or NetSuite on the same customer and returns the answer rather than every row. JustCall maps crm.contact, which 192 other connectors also map. **Does actionlake keep my JustCall data, and where?** actionlake processes and stores data in Sydney, Australia; there is no US region yet. Reads may be cached for up to 5 minutes, and a write clears the reads it affects. Each run's request and response is kept, sealed, for your plan's trace window: 1 day on Free, 3 days on Starter, 7 days on Pro, 14 days on Team, 30 days on Business and 30 days on Enterprise. Your JustCall credential is sealed under your tenant's key, never logged and never returned. Your traffic is not used to train models. **Which AI clients can use it?** Claude Code, tested by us end to end, and the Claude app as a custom connector, tested by us with an existing key. Other MCP clients that support remote servers over Streamable HTTP (MCP revisions 2025-06-18 and 2025-11-25) and OAuth dynamic client registration, or a bearer header, should connect the same way; we have not tested them. Or plain REST, under the same action names. ## More connectors like JustCall Shares the most action names with - [Aircall 15](https://actionlake.com/connectors/aircall) - [Genesys Cloud CX 12](https://actionlake.com/connectors/genesys-cloud-cx) - [Quo (formerly OpenPhone) 11](https://actionlake.com/connectors/quo-formerly-openphone) - [Retell AI 9](https://actionlake.com/connectors/retell-ai) - [Avaya Experience Platform 7](https://actionlake.com/connectors/avaya-experience-platform) - [CallTrackingMetrics 7](https://actionlake.com/connectors/calltrackingmetrics) Joins with, on shared entities - [Follow Up Boss 4](https://actionlake.com/connectors/follow-up-boss) - [Microsoft Dynamics 365 3](https://actionlake.com/connectors/microsoft-dynamics-365) - [3CX 3](https://actionlake.com/connectors/3cx) - [Close 3](https://actionlake.com/connectors/close) - [Pipedrive 3](https://actionlake.com/connectors/pipedrive) - [Outreach 3](https://actionlake.com/connectors/outreach) Browse - [All Email & messaging connectors](https://actionlake.com/connectors/category/email-and-messaging) - [All connectors](https://actionlake.com/connectors) - [How actionlake compares](https://actionlake.com/compare) actionlake is independent. It is not made or endorsed by JustCall; the name is the vendor's own. Counts are from the JustCall service file, version 1.0.0. ## Give your agent JustCall today. [Connect JustCall free](https://actionlake.com/console?start=sandbox) [See pricing](https://actionlake.com/pricing) Start free - 100,000 calls/month, no card. No signup. Hard caps on every key. Cached answers are free. --- Source: https://actionlake.com/connectors/justcall More: https://actionlake.com/llms.txt