hermes-agent/optional-skills/web-development/cloudflare-temporary-deploy/SKILL.md

name	description	version	author	license	platforms	metadata
cloudflare-temporary-deploy	Deploy a Worker live, no account, via wrangler --temporary.	1.0.0	Hermes Agent	MIT	linux macos windows	hermes tags category cloudflare workers wrangler deploy temporary agent serverless web-development web-development

Cloudflare Temporary Deploy Skill

Deploy a Cloudflare Worker to a live workers.dev URL with zero account setup, using wrangler deploy --temporary. Cloudflare provisions a throwaway account, deploys, and prints a claim URL valid for 60 minutes; unclaimed accounts auto-delete. This gives an agent a tight write → deploy → verify loop without any OAuth, signup, or token copy-paste.

This skill does NOT cover production deploys (use wrangler login + a permanent account for those), nor non-Worker Cloudflare products beyond the temporary-account limits below.

When to Use

Load this skill when the user wants to:

• Ship agent-written code to a live URL without first creating a Cloudflare account — "deploy this and give me a link"
• Iterate in a background/autonomous session where a browser OAuth step would be a hard stop
• Prototype or evaluate Workers quickly with a throwaway, claimable target
• Build a self-verifying deploy loop — deploy, curl the live URL, confirm output matches the code, redeploy

When NOT to Use

• Production or CI/CD → use a permanent account (wrangler login or CLOUDFLARE_API_TOKEN). --temporary errors out if any credential is present.
• Wrangler is already authenticated → --temporary returns an error by design. Run wrangler logout first only if the user explicitly wants a throwaway deploy.
• Long-lived hosting → temporary deployments are deleted after 60 minutes unless claimed.

Prerequisites

• Wrangler 4.102.0 or later. This is the version that introduced --temporary. Earlier versions do not have it. Verify with npx wrangler@latest --version.
• Node 18+ / npm (or npx, yarn, pnpm). No global install needed — npx wrangler@latest works.
• No Cloudflare credentials present. --temporary only works when Wrangler is unauthenticated: no OAuth login, no CLOUDFLARE_API_TOKEN / CLOUDFLARE_API_KEY env var, no ~/.wrangler / ~/.config/.wrangler cached OAuth. Use the terminal tool's environment as-is; do not set those vars.
• Network egress to cloudflare.com and workers.dev.
• Using --temporary accepts Cloudflare's Terms of Service and Privacy Policy.

How to Run

Use the terminal tool for every step. Always pin the version (wrangler@latest or wrangler@4.102.0 or newer) so you don't accidentally run an old global wrangler that lacks the flag.

1. Scaffold a minimal Worker (skip if the project already exists). A Worker needs a wrangler.toml (or wrangler.jsonc) and an entry script. Minimal TypeScript example — write these with write_file:

   wrangler.jsonc:

   {
     "name": "hello-agent",
     "main": "src/index.ts",
     "compatibility_date": "2025-01-01"
   }
   

   src/index.ts:

   export default {
     async fetch(): Promise<Response> {
       return new Response("hello cloudflare");
     },
   };
   

2. Deploy with --temporary from the project directory:

   npx wrangler@latest deploy --temporary
   

   The proof-of-work check adds a short automatic delay. On success Wrangler prints an Account: <name> (created) (or (reused)) line, a Claim URL, and the live https://<worker>.<account>.workers.dev URL.

3. Parse the URLs from that output. Run the helper to extract them reliably instead of eyeballing:

   npx wrangler@latest deploy --temporary 2>&1 | python3 scripts/parse_deploy_output.py
   

   (Resolve scripts/parse_deploy_output.py to this skill's absolute path.) It prints JSON: {"live_url", "claim_url", "account", "account_state", "expires_minutes", "deployed"}.

4. Verify the deploy is actually live — do not trust the deploy log alone. curl the live URL and confirm the body matches what the code returns:

   curl -sS <live_url>
   

5. Iterate. Edit the code, redeploy with the same npx wrangler@latest deploy --temporary. Within the 60-minute window Wrangler reuses the cached temporary account (Account: <name> (reused)), so the URL stays stable. curl again to confirm the change.

6. Hand the claim URL to the user. Tell them: open it within 60 minutes to keep the deployment and any resources; if they don't claim it, everything auto-deletes. Treat the claim URL as a secret — it grants ownership of the account.

Quick Reference

Step	Command
Check version (need 4.102.0+)	npx wrangler@latest --version
Deploy (no account)	npx wrangler@latest deploy --temporary
Deploy + parse URLs	npx wrangler@latest deploy --temporary 2>&1 | python3 scripts/parse_deploy_output.py
Verify live	curl -sS <live_url>
Clear cached temp account	npx wrangler@latest logout

Temporary account product limits

Product	Limit on a temporary account
Workers	Deploys to workers.dev
Static Assets	Up to 1,000 files, 5 MiB each
KV	Allowed
D1	1 database, 100 MB per DB / 100 MB total
Durable Objects	Allowed
Hyperdrive	2 configs, 10 connections
Queues	Up to 10
SSL/TLS certs	Allowed

Pitfalls

• --temporary is not in wrangler deploy --help and is not a global flag. It is intentionally hidden and surfaced dynamically: when an unauthenticated wrangler deploy fails, Wrangler prints "rerun with --temporary". Don't conclude the flag is missing just because --help omits it — check the version instead.
• Old global wrangler. A stale globally-installed wrangler (< 4.102.0) silently lacks the flag. Always invoke npx wrangler@latest (or a pinned >=4.102.0) so you control the version.
• Auth present → hard error. If wrangler login was ever run, or CLOUDFLARE_API_TOKEN/CLOUDFLARE_API_KEY is set, --temporary errors. Either unset the var for this shell or wrangler logout. Never strip a user's real credentials without telling them.
• Rate limiting. Creating temporary accounts too fast fails. Reuse the cached account (just redeploy) within the 60-minute window instead of forcing a new one; if rate-limited, wait or use a permanent account.
• 60-minute hard expiry, not extendable. If the deploy must outlive an hour, the user must claim it. Surface this clearly.
• curl may briefly serve the old body after a redeploy. workers.dev has a short edge cache; the (reused) line plus a new Current Version ID confirm the deploy succeeded even if curl shows stale content for a few seconds. Re-curl, or add a cache-busting query string, before concluding a redeploy failed.
• Don't log the claim URL into shared transcripts as "just a link." It is credential-equivalent.

Verification

• npx wrangler@latest --version returns >= 4.102.0.
• npx wrangler@latest deploy --temporary prints a workers.dev live URL and a claim-preview?claimToken= claim URL.
• curl -sS <live_url> returns the exact body the Worker code produces.
• A second deploy reports Account: <name> (reused) and the live URL is unchanged.
• The parser script's self-test passes: python3 scripts/parse_deploy_output.py --selftest.