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Official agent skill

Origin API

by cursor in cursor/plugins

Routes questions about the Cursor Origin API to the right section of the Origin docs and names the few rules to check first.

OfficialMITAuto-check passedBackend & APIs

Install Origin API

skills CLI
$ npx skills add cursor/plugins --skill origin-api -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install cursor/plugins origin-api --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/cursor/plugins.git skills-src && mkdir -p .claude/skills && cp -r skills-src/origin-apps/skills/origin-api .claude/skills/origin-api && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
origin-api
GitHub stars
10k
Token cost
~694 tokens
SKILL.md length
340 words
Files
1
Skills in repo
99
Repo updated
First seen
Licence
MIT

At a glance

Routes questions about the Cursor Origin API to the right section of the Origin docs and names the few rules to check first.

  • Works in 5 steps: Native or mirror. A repository is either… → Subscribe. Only installation.* events… → Verify, dedupe, acknowledge. Verify the… → …
  • A task mentions Origin
  • Reaches cursor.com
  • Origin webhooks

What it does

Origin API is an agent skill from cursor/plugins, published by the product's own GitHub organization. Routes questions about the Cursor Origin API to the right section of the Origin docs and names the few rules to check first. Use when a task mentions Origin, the Origin API, Origin Apps, or Origin webhooks, including creating an Origin App, authenticating as one, calling Origin endpoints, or handling Origin webhook deliveries.

Its SKILL.md is about 690 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts. Compatibility notes: Needs network access to https://cursor.com/docs/api/origin/ at run time.

It sits in Backend & APIs, covering Webhooks. The repository describes itself as: Cursor plugin specification and official plugins. The licence is MIT.

When your agent uses it

  • A task mentions Origin
  • Origin webhooks
  • Including creating an Origin App
  • Authenticating as one

Example prompts

  • “Use the origin-api skill to route questions about the Cursor Origin API to the right section of the Origin docs and names the few rules to check first”
  • “/origin-api”

Requirements

  • Compatibility (from SKILL.md): Needs network access to https://cursor.com/docs/api/origin/* at run time.

Workflow steps

5 steps, taken from the first numbered list in SKILL.md.

  1. Native or mirror. A repository is either native (created on Origin)
  2. Subscribe. Only installation.* events arrive without a subscription.
  3. Verify, dedupe, acknowledge. Verify the signature over the raw body
  4. Scopes from the spec. Request the union of x-origin-scopes.scopes
  5. Opaque tokens and IDs. Do not build or parse page tokens or IDs

What it can do on your machine

Read from SKILL.md and the folder at commit 9f451cf. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    Hosts in commands or code, which the agent is likely to contact:

    • cursor.com

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

  • Compatibility

    Needs network access to https://cursor.com/docs/api/origin/* at run time.

    From compatibility in the SKILL.md frontmatter.

Context cost

Origin API loads about 694 tokens when it runs. Until then it costs about 85 tokens; SKILL.md has 340 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~85
When it runs · the whole SKILL.md, loaded when a task matches
~694

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from cursor/plugins at commit 9f451cf, republished under its MIT licence (© cursor). 340 words, ~694 tokens.

Download SKILL.mdSave it as .claude/skills/origin-api/SKILL.md (or your agent's skills folder).
name
origin-api
description
Routes questions about the Cursor Origin API to the right section of the Origin docs and names the few rules to check first. Use when a task mentions Origin, the Origin API, Origin Apps, or Origin webhooks, including creating an Origin App, authenticating as one, calling Origin endpoints, or handling Origin webhook deliveries.
compatibility
Needs network access to https://cursor.com/docs/api/origin/* at run time.
license
MIT

Origin API

The docs are the source of truth. Do not name an endpoint, scope, event slug, header, or limit from memory. Where this file and the docs disagree, the docs win.

The docs live under https://cursor.com/docs/api/origin/. llms.txt is the index and links every section, endpoint, and webhook payload. openapi.yaml is the contract, and "Endpoint reference" explains its x-origin-* extensions. llms-full.txt is the whole reference in one file. changelog says what moved. For one question, start at llms.txt and fetch only the section that answers it. llms-full.txt and openapi.yaml are each several hundred kilobytes, too large to read into context whole. When you need all of them, as a porting brief does, save them locally if you can, outside any repository you are working in, search them for the section heading or annotation you need, and read only the matching part. Cite operationIds and section names.

Rules to check first

  1. Native or mirror. A repository is either native (created on Origin) or a GitHub mirror. On a native repository an installation has its full scopes and every write. On a GitHub mirror, every event except repository.pushed still arrives, every call beyond metadata and contents reads returns 403, and merging a pull request or changing the default branch is not available ("Mirrored repositories", "Events").
  2. Subscribe. Only installation.* events arrive without a subscription. A missing subscription produces silence, not an error ("Events").
  3. Verify, dedupe, acknowledge. Verify the signature over the raw body before parsing, dedupe on the delivery ID, return 2xx, then process ("Signature verification", "Retries", "Automatic disable"). Origin signs a digest, which Standard Webhooks does not, so a generic verifier fails.
  4. Scopes from the spec. Request the union of x-origin-scopes.scopes over the operations the app calls ("Scopes").
  5. Opaque tokens and IDs. Do not build or parse page tokens or IDs ("Pagination", "IDs").

One section name the index does not make obvious: what happens to a check-run post that arrives out of order is under "Ordering writes".

Porting an existing GitHub App: use port-github-app-to-origin in this plugin.

© cursor, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in origin-apps/skills/origin-api of cursor/plugins.

Open the folder on GitHubat commit 9f451cf

Compare with similar skills

Origin API next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Origin API compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Origin API this skillcursor/plugins10k—~694Automated safety check: PassMIT
Novu Design Workflownovuhq/novu40k—~2.6kAutomated safety check: PassCustom licence
Golivemikehasa/golive-skill1.2k—~13kAutomated safety check: NotesMIT
Stripe Appsfossasia/eventyay1.7k1 repos~3.6kAutomated safety check: PassApache-2.0
Dingtalk Messageagentscope-ai/ReMe3.6k—~1.6kAutomated safety check: PassApache-2.0
PR Review Provideryansongda/pay5.4k—~2.4kAutomated safety check: PassMIT

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Categories

Questions about Origin API

What does Origin API do?

Routes questions about the Cursor Origin API to the right section of the Origin docs and names the few rules to check first. Origin API is an agent skill from cursor/plugins, published by the product's own GitHub organization. Routes questions about the Cursor Origin API to the right section of the Origin docs and names the few rules to check first.

When should I use Origin API?

Origin API fits situations like: A task mentions Origin; origin webhooks; including creating an Origin App; authenticating as one.

How do I install Origin API in Claude Code?

Run `npx skills add cursor/plugins --skill origin-api -a claude-code`. Or copy the skill folder (origin-apps/skills/origin-api in cursor/plugins) into .claude/skills/origin-api in your project. Claude Code loads it when a task matches its description.

How do I install Origin API in Codex?

Run `npx skills add cursor/plugins --skill origin-api -a codex`. Or copy the skill folder (origin-apps/skills/origin-api in cursor/plugins) into .agents/skills/origin-api in your project. Codex loads it when a task matches its description.

Can I use Origin API in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add cursor/plugins --skill origin-api -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/origin-api, .gemini/skills/origin-api, .github/skills/origin-api and .opencode/skills/origin-api in your project.

What does Origin API need to run?

SKILL.md names no scripts, command-line tools or credentials: Origin API is instructions for the agent only. Compatibility (from SKILL.md): Needs network access to https://cursor.com/docs/api/origin/* at run time..

Does Origin API access the network?

SKILL.md names 1 domain. In commands or code: cursor.com; the agent is likely to contact it when it follows the instructions. This is read from the text; nothing was executed.

Is Origin API safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Origin API use?

Origin API is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Origin API use?

About 694 tokens (SKILL.md is roughly 2.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Origin API?

Skills that share tags, products or a category with Origin API: Novu Design Workflow (novuhq/novu, 40k stars), Golive (mikehasa/golive-skill, 1.2k stars), Stripe Apps (fossasia/eventyay, 1.7k stars) and Dingtalk Message (agentscope-ai/ReMe, 3.6k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Origin API?

cursor (a GitHub organization, an official publisher) maintains it in cursor/plugins, which has 10,130 GitHub stars. The repository holds 99 skills in this directory. The repository was last updated on October 6, 2026.

Source: cursor/plugins on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.