harnesses

Use Postward from OMP

Give an OMP coding agent the remote workflow plus optional local Creative tools.

15 minutes

Intermediate

OMP users

Both execution

What You Will Finish With

OMP can coordinate repository context, local media work, and reviewable Postward runs.

Register the remote server

Use OMP's MCP configuration interface to add Postward with the standard remote contract.

Server name: postward
Transport: Streamable HTTP
URL: https://postward.cc/mcp
Authentication: OAuth 2.1 with PKCE
Static API key: none

2
Complete browser consent
Authorize the workspace, then return to the harness and refresh its MCP tool inventory.
3
Install Docker
Confirm Docker can run containers before adding local Creative. The Creative image already includes FFmpeg, ImageMagick, fonts, and codecs.
```
docker version
docker pull ghcr.io/postward-cc/creative-mcp:latest
```

Register local Creative

Add a local stdio MCP server named postward-creative using this command.

docker run -i --rm -v postward-creative-output:/tmp/postward-creative ghcr.io/postward-cc/creative-mcp:latest

5
Verify both servers
Ask OMP to call get_activation_status remotely and list_tools locally. A configuration file alone is not proof.

Where to go next

Ask my agent

Copy a ready prompt for this tutorial and paste it into any agent connected to Postward.

Preview the prompt

Follow the Postward tutorial "Use Postward from OMP".

Outcome: OMP can coordinate repository context, local media work, and reviewable Postward runs.
Prerequisites to verify first: OMP with MCP support; Docker for local Creative; A Postward account.

Steps:
1. Register the remote server: Use OMP's MCP configuration interface to add Postward with the standard remote contract.
2. Complete browser consent: Authorize the workspace, then return to the harness and refresh its MCP tool inventory.
3. Install Docker: Confirm Docker can run containers before adding local Creative. The Creative image already includes FFmpeg, ImageMagick, fonts, and codecs.
4. Register local Creative: Add a local stdio MCP server named postward-creative using this command.
5. Verify both servers: Ask OMP to call get_activation_status remotely and list_tools locally. A configuration file alone is not proof.

First inspect my environment and existing configuration, and verify each prerequisite before acting.
Follow the current Postward documentation rather than assuming tool names.
Do not replace unrelated configuration.
Verify the result and report exactly what changed.

Prerequisites

OMP with MCP support
Docker for local Creative
A Postward account

Works With

Oh My Pi