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@letmepost/cli is a small, fast CLI that wraps the letmepost.dev REST API. Designed for terminal use, scripts, CI, and agentic tools like opencode that need a stable command surface to shell into.

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Install

npm install -g @letmepost/cli
# or run without installing
npx @letmepost/cli --help
The binary is named lmp. Versions older than Node 18 are not supported.

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Login

lmp login
Opens your browser to authorize the CLI via OAuth 2.1 with PKCE. The CLI:
  1. Registers itself dynamically with the OAuth provider (RFC 7591).
  2. Opens a browser to the consent page.
  3. Receives the auth code on a localhost callback.
  4. Exchanges the code for an access token.
  5. Trades the access token for a long-lived API key (so subsequent calls don’t depend on token refresh).
  6. Saves everything to ~/.letmepost/config.json (mode 0600).
If you’re in a headless environment, the URL is printed so you can copy it to another browser. If the OAuth provider isn’t reachable, the CLI falls back to prompting for an API key paste. 
lmp logout         # clears ~/.letmepost/config.json
lmp whoami         # prints which credential is loaded and what it can see
lmp version        # CLI version + active API base

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Environment overrides

VariableDescription
LMP_API_KEYSkip the stored credential entirely and use this Bearer key for the call.
LMP_API_BASEOverride the API host (defaults to https://api.letmepost.dev). For self-hosted.

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Profiles

A single organization can carve into N profiles for per-client isolation. Pick which one to publish under. 
lmp profiles list                 # all profiles in the active org
lmp profiles use prof_01HX...     # set as the default for subsequent calls
lmp profiles current              # print the active profile
Per-command override: 
lmp post "hello" --to=bluesky --profile prof_01HX...
lmp accounts list --profile prof_01HX...
lmp posts list --profile prof_01HX...
If the loaded credential is itself profile-scoped, passing a different --profile returns a clean validation_failed with rule: profile.scope_mismatch.

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Accounts

lmp accounts list                          # every connected account in the active profile
lmp accounts list --platform bluesky       # filter
lmp accounts disconnect acc_01HX...        # hard-delete (revokes the upstream token if possible)

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Posting

lmp post "Shipping the CLI today" --to=twitter,bluesky
lmp post "Reels are live" --to=instagram --media=./hero.mp4
lmp post "Lots happening" --to=twitter,bluesky --first-comment="Threading more below."
lmp post "Big news" --to=linkedin --schedule=2026-05-20T18:00:00Z
A single call fans out to every platform in --to. The response renders per-target results: 
✔ published to twitter — https://x.com/.../status/1234567890
✔ published to bluesky — at://did:plc:.../app.bsky.feed.post/...
✗ failed on instagram
  code:        preflight_failed
  rule:        instagram.media.aspect_ratio
  message:     Instagram Reels require 9:16 aspect ratio; got 16:9.
  remediation: Re-encode the video to 9:16 (1080×1920 is the safe default).
  docs:        https://docs.letmepost.dev/preflight/instagram-media-aspect_ratio
  requestId:   req_01HY6X4AWBJM2K9F2PTQMRD9JQ
batch pst_01HX… (partial_failed)
Exit code is 0 on full success, 2 on any failure. Useful in pipelines: 
lmp post "$(date)" --to=bluesky || echo "post failed, alert the on-call"

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Post log

lmp posts list                                # most recent 20
lmp posts list --limit 100 --status rejected  # filter
lmp posts get pst_01HX...                     # one post + all attempts

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Self-host

Point the CLI at your own deployment by setting LMP_API_BASE: 
LMP_API_BASE=https://api.yourdomain.com lmp login
LMP_API_BASE=https://api.yourdomain.com lmp post "hello" --to=bluesky
Or persist it: after lmp login the chosen base URL is saved alongside the credential, so subsequent calls reuse it without the env var.

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Use from opencode / shell agents

The CLI prints structured output and uses standard exit codes, so it composes cleanly into agentic tool definitions: 
{
  "tools": [
    {
      "name": "publish_post",
      "command": "lmp post \"{text}\" --to={platforms}",
      "description": "Publish a text post to one or more social platforms."
    }
  ]
}
For tighter integration, use the MCP server directly. It wraps the same API and exposes one tool per OpenAPI operation.

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Source + roadmap

  • Source: github.com/letmepost/letmepost.dev/tree/main/apps/cli
  • Apache 2.0
  • v0.1 ships with: login, logout, whoami, version, accounts list/disconnect, post, posts list/get, profiles list/use/current
  • v0.2 will add: media upload, webhooks subcommands, keys (mint/list/revoke API keys), refresh-token rotation for OAuth-only auth