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Official agent skill

Routing Outbound API Calls

by PostHog in PostHog/posthog

Use before adding or changing Python code that calls a third-party HTTP API from PostHog (a vendor REST call, a vendor SDK client, a scraping or enrichment service), and before adding or changing a…

OfficialCustom licenceAuto-check passedBackend & APIs

Install Routing Outbound API Calls

skills CLI
$ npx skills add PostHog/posthog --skill routing-outbound-api-calls -a claude-code

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

GitHub CLI
$ gh skill install PostHog/posthog routing-outbound-api-calls --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/PostHog/posthog.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/routing-outbound-api-calls .claude/skills/routing-outbound-api-calls && 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
routing-outbound-api-calls
GitHub stars
40k
Token cost
~2.7k tokens
SKILL.md length
1,245 words
Files
1
Skills in repo
252
Repo updated
First seen
Licence
Custom licence

At a glance

Use before adding or changing Python code that calls a third-party HTTP API from PostHog (a vendor REST call, a vendor SDK client, a scraping or enrichment service), and before adding or changing a…

  • Works in 4 steps: Identity. The budget owner in the… → Budget. A documented vendor limit means… → Lanes. Keep the default reserve: BATCH… → …
  • Third-party API
  • SKILL.md covers Route first, Decide before you write code, Source every vendor fact and Build a new domain, plus 3 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Routing Outbound API Calls is an agent skill from PostHog/posthog, published by the product's own GitHub organization. Use before adding or changing Python code that calls a third-party HTTP API from PostHog (a vendor REST call, a vendor SDK client, a scraping or enrichment service), and before adding or changing a domain under posthog/egress/: its budget, priority lanes, identity, metrics, or rate-limit headers. Routes the call to an existing egress domain, a new gated domain, a record-only domain, or no domain at all, names the reference domain to copy, and lists the tests that catch a missing priority reserve. Trigger terms…

Its SKILL.md is about 2.7k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Backend & APIs, covering Rate limiting, Third-party API integration and REST APIs. It works with PostHog, GitHub and Python. The repository describes itself as: :hedgehog: PostHog is the leading platform for building self-driving products. Our developer tools – AI observability, analytics, session replay, flags, experiments, error…

When your agent uses it

  • Third-party API
  • RecordedEgressClient

Example prompts

  • “/routing-outbound-api-calls”

Requirements

  • Python 3

Workflow steps

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

  1. Identity. The budget owner in the vendor's own id space: an installation, an account, a fleet. Never a PostHog row id. A secret identity…
  2. Budget. A documented vendor limit means the budget stays under it. No documented limit means an operator ceiling on spend, read from…
  3. Lanes. Keep the default reserve: BATCH is denied at 70% of a window, NORMAL at 90%. Pass reserve={} only when every caller runs on one…
  4. Headers. Parse only the rate-limit headers the vendor documents, and declare a gauge only for those. A header with an undocumented…

What it can do on your machine

Read from SKILL.md and the folder at commit 10f9ad7. 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

    No URLs in SKILL.md.

    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.

Context cost

Routing Outbound API Calls loads about 2.7k tokens when it runs. Until then it costs about 180 tokens; SKILL.md has 1,245 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~180
When it runs · the whole SKILL.md, loaded when a task matches
~2.7k

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

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 1,245 words (~2,664 tokens).

“posthog/egress/ owns every outbound third-party API call that needs a shared budget or telemetry. posthog/egress/README.md is the reference for the mechanisms, and each domain's own README.md holds the facts about that API. This skill holds the procedure and the traps.”

— opening of SKILL.md by PostHog, Custom licence
name
routing-outbound-api-calls

Read the full SKILL.md on GitHub

Files

Just SKILL.md in .agents/skills/routing-outbound-api-calls of PostHog/posthog.

Open the folder on GitHubat commit 10f9ad7

Used in 1 other repository

We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders. This page covers the copy in PostHog/posthog, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Routing Outbound API Calls 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.

Routing Outbound API Calls compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Routing Outbound API Calls this skillPostHog/posthog40k—~2.7kAutomated safety check: PassCustom licence
Proxy6VKirill/claude-lane-stack122—~3.6kAutomated safety check: PassMIT
Dinobase Connector Builderkappa90/dinobase263—~1.9kAutomated safety check: PassCustom licence
Frappe Core APIImpertio-Studio/Frappe_Claude_Skill_Package1871 repos~3.2kAutomated safety check: PassMIT
Bfl APIblack-forest-labs/skills1251 repos~2.5kAutomated safety check: NotesMIT
Apikerhodgef/apiker127—~1.4kAutomated safety check: PassMIT

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Works with

Categories

Questions about Routing Outbound API Calls

What does Routing Outbound API Calls do?

Use before adding or changing Python code that calls a third-party HTTP API from PostHog (a vendor REST call, a vendor SDK client, a scraping or enrichment service), and before adding or changing a…. Routing Outbound API Calls is an agent skill from PostHog/posthog, published by the product's own GitHub organization. Use before adding or changing Python code that calls a third-party HTTP API from PostHog (a vendor REST call, a vendor SDK client, a scraping or enrichment service), and before adding or changing a domain under posthog/egress/: its budget, priority lanes, identity, metrics, or rate-limit headers.

When should I use Routing Outbound API Calls?

Routing Outbound API Calls fits situations like: third-party API; recordedEgressClient.

How do I install Routing Outbound API Calls in Claude Code?

Run `npx skills add PostHog/posthog --skill routing-outbound-api-calls -a claude-code`. Or copy the skill folder (.agents/skills/routing-outbound-api-calls in PostHog/posthog) into .claude/skills/routing-outbound-api-calls in your project. Claude Code loads it when a task matches its description.

How do I install Routing Outbound API Calls in Codex?

Run `npx skills add PostHog/posthog --skill routing-outbound-api-calls -a codex`. Or copy the skill folder (.agents/skills/routing-outbound-api-calls in PostHog/posthog) into .agents/skills/routing-outbound-api-calls in your project. Codex loads it when a task matches its description.

Can I use Routing Outbound API Calls 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 PostHog/posthog --skill routing-outbound-api-calls -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/routing-outbound-api-calls, .gemini/skills/routing-outbound-api-calls, .github/skills/routing-outbound-api-calls and .opencode/skills/routing-outbound-api-calls in your project.

What does Routing Outbound API Calls need to run?

SKILL.md names no scripts, command-line tools or credentials: Routing Outbound API Calls is instructions for the agent only. Our summary lists: Python 3.

Does Routing Outbound API Calls access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Routing Outbound API Calls 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 Routing Outbound API Calls use?

Routing Outbound API Calls has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Routing Outbound API Calls use?

About 2.7k tokens (SKILL.md is roughly 11k 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 Routing Outbound API Calls?

Skills that share tags, products or a category with Routing Outbound API Calls: Proxy6 (VKirill/claude-lane-stack, 122 stars), Dinobase Connector Builder (kappa90/dinobase, 263 stars), Frappe Core API (Impertio-Studio/Frappe_Claude_Skill_Package, 187 stars) and Bfl API (black-forest-labs/skills, 125 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Routing Outbound API Calls?

PostHog (a GitHub organization, an official publisher) maintains it in PostHog/posthog, which has 40,182 GitHub stars. The repository holds 252 skills in this directory. The repository was last updated on October 8, 2026.

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