[External Plugin]: postbridge

[zimoh]

Plugin name

postbridge

Short description

Postal execution layer: quote, send, track, and prove physical letters from GitHub Copilot. Ships a remote Streamable HTTP MCP server (api.postbridge.ai/mcp, subscription-backed API-key auth) plus skills for send, track, and proof-of-delivery workflows.

GitHub repository

https://github.com/PostbridgeAI/postbridge-agent-plugin

Plugin path inside the repository

No response

Ref to review

v0.1.0

Commit SHA to review

22d5a133e06a1ca4fb9821e27c35c926f0c74e97

Version

0.1.0

License identifier

MIT

Author name

PostBridge

Author URL

https://github.com/PostbridgeAI

Homepage URL

https://postbridge.ai

Keywords

postal
mail
letters
certified-mail
proof-of-delivery
postbridge
mcp

Additional notes for reviewers

Disclosure: I am affiliated with PostBridge, the service this plugin wraps.

The plugin conforms to the Agent Plugins 1.0.0 specification (validated plugin.json and mcp.json against the official schemas) and the Agent Skills specification. It packages:

• One remote streamable-http MCP server pointing at https://api.postbridge.ai/mcp. The endpoint requires a subscription-backed API key supplied client-side; the package ships no credentials.
• Three skills: send-letter (quote → confirm → send, with a 5-country address-format reference), track-and-proof (carrier tracking + delivery proof), and wallet (balance/top-up).

The send and top-up tools move real money; the bundled skills require explicit user confirmation before any spend, and the server-side auth boundary is fail-closed. Read-only tools (list_services, get_quote, get_balance, list_letters, track_letter, get_proof) can be exercised during review with a key; happy to provide review/test credentials if helpful.

Submission checklist

• The plugin lives in a public GitHub repository.
• The ref and/or sha I provided is immutable (release tag and/or full 40-character commit SHA), not a branch.
• This submission follows this repository's contribution, security, and responsible AI policies.
• This plugin is not already listed in the Awesome Copilot marketplace.

[zimoh]

/rerun-intake

[github-actions]

✅ External plugin intake passed

This submission passed automated intake validation and quality checks and is ready for maintainer review.

• Plugin: postbridge
• Repository: https://github.com/PostbridgeAI/postbridge-agent-plugin
• Ref: v0.1.0
• SHA: 22d5a133e06a1ca4fb9821e27c35c926f0c74e97

Quality gate summary

Legend: ✅ pass · ⚠️ warning · 🛑 fail

Gate	Status
spec compliance (non-blocking)	✅ pass
vally lint	✅ pass
install smoke test	✅ pass
version match	✅ pass
ref/sha consistency	✅ pass
canvas structure	⚪ not_run

• spec compliance: pass
• vally lint: pass
• install smoke test: pass
• version match: pass
• ref/sha consistency: pass
• canvas structure: not_run
• overall: pass

spec compliance output (✅ pass)

Agent Plugins v1.0.0 manifest checks passed for plugin.json.

vally lint output (✅ pass)

✅ send-letter (2/2 checks passed)
    ✓ [spec-compliance] All 1 skill(s) are spec-compliant.
        ✓ spec-compliance: All spec checks passed.
    ✓ [valid-refs] All file references across 1 skill(s) are valid.
        ✓ valid-refs: All file references resolve to existing files within the skill directory.
✅ track-and-proof (2/2 checks passed)
    ✓ [spec-compliance] All 1 skill(s) are spec-compliant.
        ✓ spec-compliance: All spec checks passed.
    ✓ [valid-refs] All file references across 1 skill(s) are valid.
        ✓ valid-refs: All file references resolve to existing files within the skill directory.
✅ wallet (2/2 checks passed)
    ✓ [spec-compliance] All 1 skill(s) are spec-compliant.
        ✓ spec-compliance: All spec checks passed.
    ✓ [valid-refs] All file references across 1 skill(s) are valid.
        ✓ valid-refs: All file references resolve to existing files within the skill directory.

3 skill(s) linted, 3 passed

install smoke test output (✅ pass)

Install smoke test succeeded. Verified /tmp/external-plugin-quality-J12SjL/copilot-home/.copilot/installed-plugins/external-plugin-intake/postbridge/plugin.json.

Version match output

- v0.1.0: matched version "0.1.0" at "plugin.json".
- 22d5a133e06a1ca4fb9821e27c35c926f0c74e97: matched version "0.1.0" at "plugin.json".

Ref/SHA consistency output

source.ref "v0.1.0" resolves to the same commit as source.sha "22d5a133e06a1ca4fb9821e27c35c926f0c74e97".

Canvas structure output

Canvas structure gate skipped because plugin is not tagged with "canvas".

Canonical external.json payload

{
  "name": "postbridge",
  "description": "Postal execution layer: quote, send, track, and prove physical letters from GitHub Copilot. Ships a remote Streamable HTTP MCP server (api.postbridge.ai/mcp, subscription-backed API-key auth) plus skills for send, track, and proof-of-delivery workflows.",
  "version": "0.1.0",
  "author": {
    "name": "PostBridge",
    "url": "https://github.com/PostbridgeAI"
  },
  "repository": "https://github.com/PostbridgeAI/postbridge-agent-plugin",
  "homepage": "https://postbridge.ai",
  "license": "MIT",
  "keywords": [
    "postal",
    "mail",
    "letters",
    "certified-mail",
    "proof-of-delivery",
    "postbridge",
    "mcp"
  ],
  "source": {
    "source": "github",
    "repo": "PostbridgeAI/postbridge-agent-plugin",
    "ref": "v0.1.0",
    "sha": "22d5a133e06a1ca4fb9821e27c35c926f0c74e97"
  }
}

View workflow run

[aaronpowell]

/reject Sorry, we're not a channel for purely paid services.

[github-actions]

❌ External plugin rejected

A maintainer rejected postbridge, and the submission issue has been closed.

Reason

Sorry, we're not a channel for purely paid services.

If you address the feedback, edit this issue with the updated details and have the issue author or a maintainer comment /rerun-intake to re-run automated intake.