Ringback MCP

An official MCP server by 0xpi that allows AI agents to estimate missed-call costs, explain the Ringback service, and retrieve a customer's own missed call logs and sent text history via authenticated read-only tools.

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

Vendor evidenceStreamable HTTPNo sign-inEndpoint checked 2026-11-06Operated by 0xpi

You need:Auth: a personal token the owner creates and revokes in Settings, AI assistants, sent as the header Authorization: Bearer (never in a URL).

MCP endpoint (Streamable HTTP)

https://ringback.0xpi.com/mcp

Vendor documentation

What its tools do

4 tools, grouped by the hints the server advertises. Hints are self-declared, not verified behavior.

4 of 4 have a description · 4 of 4 declare behavior hints · 3 of 3 with parameters document them all

Checks and signals

Each line is separate evidence, not a trust score.

Passed Endpoint answered the live check · Nov 6, 2026, 11:43 PM UTC
Passed Official MCP Registry namespace is tied to ringback.0xpi.com · Nov 6, 2026, 11:15 PM UTC
Passed Endpoint is on the registry namespace domain · Nov 6, 2026, 11:15 PM UTC
Availability 1 of 1 checks passed in 30 days

What you can do with it

Estimate the cost of missed calls based on business metrics
Retrieve a list of missed calls for a specific date range
Retrieve a list of sent texts for a specific date range
Explain how the Ringback missed-call text-back service works

Source and maintenance

Vendor evidenceRegistry 1.0.0

mcp-registry: com.0xpi.ringback/missed-call-text-back@1.0.0 Project website

Protocol and capabilities

Server: com.0xpi.ringback/missed-call-text-back 1.0.0
MCP protocol negotiated in check: 2025-11-25
Tools: 4 advertised
Resources: Not advertised
Resource templates: Not advertised
Prompts: Not advertised

Server-advertised capabilities

{
  "tools": {
    "listChanged": false
  }
}

Server-provided instructions

Untrusted server output shown for inspection. It is not Koskamo guidance and is excluded from knowledge search.

Ringback is missed-call text-back for HVAC, plumbing, electrical and other service businesses: when a call is missed, the caller gets a text from the business's own number. Public tools: estimate_missed_call_cost does the arithmetic on the user's own call numbers (assumptions shown, an estimate, not a promise); how_ringback_works gives the facts, price and trial terms. Ringback customers can connect their own account with a personal access token (Ringback Settings, AI assistants; header Authorization: Bearer <token>): my_missed_calls and my_texts_sent read only that business's call and text log.

Tools

4 advertised

estimate_missed_call_cost — Estimate what missed calls cost a service business

Advertised by the server during the last successful anonymous check.

Advertised read-only

Arithmetic on your own numbers: calls per week x missed % x close rate x average job value, per week, month and year, with every step and assumption shown. It is an estimate of the value of jobs at stake from missed calls, not a prediction of what any tool will recover. Also shows how many saved jobs a month would cover Ringback's price.

estimate_missed_call_cost input schema

{
  "type": "object",
  "required": [
    "calls_per_week",
    "missed_percent",
    "average_job_value",
    "close_rate_percent"
  ],
  "properties": {
    "calls_per_week": {
      "type": "number",
      "maximum": 10000,
      "minimum": 0,
      "description": "Inbound calls the business gets in a typical week."
    },
    "missed_percent": {
      "type": "number",
      "maximum": 100,
      "minimum": 0,
      "description": "Share of those calls that go unanswered, in percent (e.g. 25)."
    },
    "average_job_value": {
      "type": "number",
      "maximum": 1000000,
      "minimum": 0,
      "description": "Average revenue per job, in US dollars."
    },
    "close_rate_percent": {
      "type": "number",
      "maximum": 100,
      "minimum": 0,
      "description": "Share of answered callers who normally book a job, in percent (e.g. 30)."
    }
  },
  "additionalProperties": false
}

estimate_missed_call_cost annotations

{
  "title": "Estimate missed-call cost",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}

how_ringback_works — How Ringback works, what it costs, what it does not do

Advertised by the server during the last successful anonymous check.

Advertised read-only

Facts about Ringback, missed-call text-back for contractors and home-service businesses: how the text is sent, phone requirements (Android, iPhone options), what the owner sees, price ($17/month or $170/year per business line), the 7-day free trial with no card, and what Ringback does not do.

how_ringback_works input schema

{
  "type": "object",
  "properties": {},
  "additionalProperties": false
}

how_ringback_works annotations

{
  "title": "How Ringback works",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}

my_missed_calls — My missed calls (from my Ringback call log)

Advertised by the server during the last successful anonymous check.

Advertised read-only

List the missed calls in your own Ringback call log for a time range: when, the caller's number, whether a text-back went out (and its delivery status) or why not (e.g. already texted recently, opted out, do-not-text), and the lead's status. Counts first, then up to 50 most recent calls. Needs a personal Ringback access token, created by the business owner in Ringback (Settings, AI assistants) and sent as "Authorization: Bearer <token>". Read-only; reads only that business's own call and text log.

my_missed_calls input schema

{
  "type": "object",
  "properties": {
    "range": {
      "enum": [
        "today",
        "7d",
        "30d",
        "90d"
      ],
      "type": "string",
      "description": "Time range: \"today\" (since midnight in the business's time zone), \"7d\", \"30d\" or \"90d\" (that many days back from now). Default \"7d\"."
    }
  },
  "additionalProperties": false
}

my_missed_calls annotations

{
  "title": "My missed calls",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}

my_texts_sent — Texts my Ringback line sent

Advertised by the server during the last successful anonymous check.

Advertised read-only

List the texts your Ringback line sent in a time range: missed-call text-backs, your replies from the dashboard and automatic replies, with delivery status as the phone reported it, the median time from call to text-back, and up to 50 most recent texts with their wording. Needs a personal Ringback access token, created by the business owner in Ringback (Settings, AI assistants) and sent as "Authorization: Bearer <token>". Read-only; reads only that business's own call and text log.

my_texts_sent input schema

{
  "type": "object",
  "properties": {
    "range": {
      "enum": [
        "today",
        "7d",
        "30d",
        "90d"
      ],
      "type": "string",
      "description": "Time range: \"today\" (since midnight in the business's time zone), \"7d\", \"30d\" or \"90d\" (that many days back from now). Default \"7d\"."
    }
  },
  "additionalProperties": false
}

my_texts_sent annotations

{
  "title": "My texts sent",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

90-day uptime

A lightweight connection check about every six hours, sampled on hosts with many listings. It shows the server answered, not that its tools work.

Too few checks for a percentage yet (3 of 3 answered).

2026-11-07: 2 of 2 checks answered
2026-11-09: 1 of 1 checks answered

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks: 1 of 1 (100%)
Average latency: 309 ms
95th percentile latency: 309 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

Nov 6, 2026, 11:43 PM UTC · probe · passed · 309 ms · metadata changed · 4 tool(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http ringback-mcp https://ringback.0xpi.com/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add ringback-mcp --url https://ringback.0xpi.com/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable ringback-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "ringback-mcp": {
      "url": "https://ringback.0xpi.com/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).

Cline configuration

{
  "mcpServers": {
    "ringback-mcp": {
      "type": "streamableHttp",
      "url": "https://ringback.0xpi.com/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start ringback-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "ringback-mcp": {
      "type": "http",
      "url": "https://ringback.0xpi.com/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http ringback-mcp https://ringback.0xpi.com/mcp

Claude Desktop

Open Claude Settings > Connectors > Add custom connector, enter this server URL and enable it for the conversation. This is a manual remote-connector handoff, not a desktop JSON configuration.

Claude Desktop configuration

https://ringback.0xpi.com/mcp

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "ringback-mcp": {
      "serverUrl": "https://ringback.0xpi.com/mcp"
    }
  }
}

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Ringback MCP

Endpoint and access

What its tools do

Read-only (4)

Checks and signals

What you can do with it

Source and maintenance

Protocol and capabilities

Server-provided instructions

Tools

Prompts

Resources

90-day uptime

30-day availability

Maintenance history

Connect from your client

Claude Code

Codex

Cursor

Cline

VS Code

Gemini CLI

Claude Desktop

Windsurf

Let your agent find its tools

Other crm, sales, and marketing servers

Do you run Ringback MCP?