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Postbye

Look up cancellation methods, mailing addresses, notice periods, and letters for more than 8,600 subscriptions.

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Install Postbye

Pick your client, then add it in one click or paste the config.

Streamable HTTP (Remote)
Server URL
https://postbye.com/mcp

Remote servers are added in the app, not the config file: Customize → Connectors → Add custom connector, then paste this URL.

Hosted endpointLive · 1d agoLive Remote EndpointOur automated health check connected to this remote MCP endpoint successfully.Last checked 1d ago · Nov 12, 2026, 19:45 UTC

Clients with native remote MCP support can connect directly to this URL.

Remote endpoint
https://postbye.com/mcp

Overview

Postbye MCP server gives AI clients access to subscription-cancellation guidance for more than 8,600 subscriptions. It supports lookups for cancellation methods, mailing addresses, notice periods, and cancellation letters. Use it when an agent needs to research the steps and information required to cancel a subscription.

Use cases

  • Find the cancellation method for a named subscription
  • Retrieve a mailing address for a cancellation notice
  • Check a subscription's required notice period
  • Prepare a cancellation letter for a subscription

Key features

  • Lookup coverage for more than 8,600 subscriptions
  • Cancellation method guidance
  • Mailing address lookup
  • Notice period lookup
  • Cancellation letter information

Tools4

What Postbye lets your agent do. Expand a tool for its parameters.

Verified live~518 tokens of context

Security & health

What it can reach and how reliably it runs — from our own checks, not the maintainer’s claims.

ActiveLast checked

Recent health check succeeded.

5/5 checks healthy over the last 17d

What it can do

From the 4 tools this server returned when we ran it.

Makes network requests · 2Read-only tools · 4

Observed 2026-10-27 in an isolated sandbox. A description of reach, not a security audit.

Adoption & maintenance

Factual signals from GitHub, npm, and our automated checks — not a rating.

Availability100%Our rolling endpoint + install checks that succeeded.
Tools exposed4Callable tools this server registers over MCP.
Directory activity1 viewsConfig copies, upvotes, and views on AllMCPs.

How Postbye works

What Postbye does

Postbye provides subscription-cancellation reference information through MCP. Its coverage includes more than 8,600 subscriptions and focuses on the practical details needed to submit a cancellation request.

An AI client can use Postbye to look up how a particular subscription should be cancelled, where cancellation notices should be sent, how much notice may be required, and whether a cancellation letter is available. These details help an agent turn a general request such as “cancel this subscription” into a more specific set of instructions.

The service is suited to research and preparation. It can help identify the relevant cancellation route and supporting information before a user contacts the subscription provider.

Tools and capabilities

Postbye’s lookup capabilities cover four main types of information:

  • Cancellation methods, such as the stated way to request cancellation.
  • Mailing addresses for cancellation notices.
  • Notice periods that may affect when a cancellation takes effect.
  • Cancellation letters that can support the request.

The service is useful when the subscription’s cancellation process is unclear or when a user needs a formal notice prepared. Queries should identify the subscription being researched so the returned guidance can be matched to the correct service.

Postbye is an information lookup service rather than a replacement for the cancellation process itself. The returned method, address, notice period, or letter can guide the next step, but the user or another system must follow the applicable cancellation procedure.

Its narrow scope makes it a fit for agents that need subscription-cancellation research alongside other workflows. It is less suited to general finance operations or tasks unrelated to finding cancellation instructions.

Read the full README

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Frequently Asked Questions about Postbye

Postbye is an MCP server that connects AI clients to Postbye's reference data for cancelling subscriptions. Its main tools support lookups for cancellation methods, mailing addresses, notice periods, and cancellation letters across more than 8,600 subscriptions. It helps an agent research the required steps before a user cancels a subscription.

Postbye can find cancellation methods, mailing addresses, notice periods, and cancellation letters for subscriptions covered by its lookup service. This information helps determine how and where to submit a cancellation request.

No, Postbye provides cancellation guidance rather than completing the cancellation itself. Use its lookup results to identify the required method, address, notice period, or letter before submitting the request.

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