Cloudflare Email Service
hodgef/apiker
Send and receive transactional emails with Cloudflare Email Service (Email Sending + Email Routing).
Implement or debug Cloudflare Email Service sending, Email Routing, or an Agents SDK email handler.
Install Cloudflare Email Service
$ npx skills add swyxio/skills --skill cloudflare-email-service -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install swyxio/skills cloudflare-email-service --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/swyxio/skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/cloudflare-email-service .claude/skills/cloudflare-email-service && rm -rf skills-srcUse ~/.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/
Install the "cloudflare-email-service" agent skill from https://github.com/swyxio/skills/tree/main/cloudflare-email-service into .claude/skills/cloudflare-email-service/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cloudflare-email-service", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/swyxio/skills/tree/main/cloudflare-email-serviceType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add swyxio/skills --skill cloudflare-email-service -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install swyxio/skills cloudflare-email-service --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/swyxio/skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/cloudflare-email-service .agents/skills/cloudflare-email-service && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "cloudflare-email-service" agent skill from https://github.com/swyxio/skills/tree/main/cloudflare-email-service into .agents/skills/cloudflare-email-service/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cloudflare-email-service", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add swyxio/skills --skill cloudflare-email-service -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install swyxio/skills cloudflare-email-service --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/swyxio/skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/cloudflare-email-service .cursor/skills/cloudflare-email-service && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "cloudflare-email-service" agent skill from https://github.com/swyxio/skills/tree/main/cloudflare-email-service into .cursor/skills/cloudflare-email-service/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cloudflare-email-service", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/swyxio/skills.git --path cloudflare-email-service--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add swyxio/skills --skill cloudflare-email-service -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install swyxio/skills cloudflare-email-service --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/swyxio/skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/cloudflare-email-service .gemini/skills/cloudflare-email-service && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "cloudflare-email-service" agent skill from https://github.com/swyxio/skills/tree/main/cloudflare-email-service into .gemini/skills/cloudflare-email-service/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cloudflare-email-service", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install swyxio/skills cloudflare-email-serviceInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add swyxio/skills --skill cloudflare-email-service -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/swyxio/skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/cloudflare-email-service .github/skills/cloudflare-email-service && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "cloudflare-email-service" agent skill from https://github.com/swyxio/skills/tree/main/cloudflare-email-service into .github/skills/cloudflare-email-service/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cloudflare-email-service", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add swyxio/skills --skill cloudflare-email-service -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install swyxio/skills cloudflare-email-service --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/swyxio/skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/cloudflare-email-service .opencode/skills/cloudflare-email-service && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "cloudflare-email-service" agent skill from https://github.com/swyxio/skills/tree/main/cloudflare-email-service into .opencode/skills/cloudflare-email-service/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cloudflare-email-service", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
cloudflare-email-service- GitHub stars
- 176
- Token cost
- ~684 tokens
- SKILL.md length
- 296 words
- Files
- 6 (incl. references)
- Skills in repo
- 89
- Repo updated
- First seen
- Licence
- MIT
At a glance
Implement or debug Cloudflare Email Service sending, Email Routing, or an Agents SDK email handler.
- The Workers email binding
- SKILL.md covers Choose the surface, Verify prerequisites and… and Validate the owning path
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Email Service REST API
What it does
Cloudflare Email Service is an agent skill from swyxio/skills. Implement or debug Cloudflare Email Service sending, Email Routing, or an Agents SDK email handler. Use for the Workers email binding, Email Service REST API, SMTP, inbound email() handlers, domain onboarding, deliverability, or Cloudflare email tooling. Do not trigger for provider-neutral email design or non-Cloudflare mail services.
Its SKILL.md is about 680 tokens, which your agent loads only when the skill is triggered. The skill folder holds 6 other files, including reference files (for example `references/cli-and-mcp.md`, `references/deliverability.md` and `references/rest-api.md`).
It sits in Backend & APIs, covering Transactional email and REST APIs. It works with Cloudflare and Model Context Protocol. The repository describes itself as: Agent skills for Claude Code and other AI agents. The licence is MIT.
When your agent uses it
- The Workers email binding
- Email Service REST API
- Inbound email() handlers
- Domain onboarding
Example prompts
- “/cloudflare-email-service”
What it can do on your machine
Read from SKILL.md and the folder at commit 038ef34. 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
Cloudflare Email Service loads about 684 tokens when it runs, and up to ~9.7k if it reads all its reference files. Until then it costs about 91 tokens; SKILL.md has 296 words of instructions outside code blocks.
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 swyxio/skills at commit 038ef34, republished under its MIT licence (© swyxio). 296 words, ~684 tokens.
Download SKILL.mdSave it as
.claude/skills/cloudflare-email-service/SKILL.md (or your agent's skills folder). This skill also uses 5 other files; get the full folder from GitHub.- name
- cloudflare-email-service
- description
- Implement or debug Cloudflare Email Service sending, Email Routing, or an Agents SDK email handler. Use for the Workers email binding, Email Service REST API, SMTP, inbound `email()` handlers, domain onboarding, deliverability, or Cloudflare email tooling. Do not trigger for provider-neutral email design or non-Cloudflare mail services.
Cloudflare Email Service
Retrieve current Cloudflare documentation and installed Workers types before using API signatures, limits, pricing, or CLI commands. Email Service is evolving and the Workers binding, REST API, SMTP, and Email Routing have distinct contracts.
Choose the surface
| Need | Use | Reference |
|---|---|---|
| Send from a Worker | Email binding | sending.md |
| Send from outside Workers | REST API or SMTP | rest-api.md |
| Receive, forward, reject, or parse mail | Email Routing email() handler | routing.md |
| Configure domains or agent tooling | Wrangler/API/MCP setup | cli-and-mcp.md |
| Diagnose bounces, authentication, or reputation | Deliverability | deliverability.md |
Prefer the Worker binding inside Workers unless the existing application already has a reason to use another supported surface. Do not invent one request shape for all surfaces: field names and response envelopes differ.
Verify prerequisites and boundaries
- Resolve the exact account, domain, environment, and sending or routing configuration before changing provider state.
- Confirm the sending domain is onboarded and that the target Worker environment has the required binding.
- Keep API tokens and message secrets in the platform's secret mechanism, never in source or diagnostic output.
- Treat inbound
message.rawas a single-use stream; buffer it once when several consumers need the content. - Forward only to destinations allowed by the current Email Routing contract.
- Preserve the existing application handler when adding email; do not expand a delivery task into unrelated persistence, marketing, or workflow architecture.
For Agents SDK email, verify the installed Agents SDK version and read both the Agents and Email Service documentation. Do not assume their release cadence or types are synchronized.
Validate the owning path
Use a controlled address and a non-sensitive fixture. Verify the exact sender domain, recipient handling, text/HTML or raw MIME shape, and the surface actually used by the application. Distinguish provider acceptance, queueing, delivery, bounce, forwarding, and application processing; one does not prove the others.
© swyxio, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 5 other files (references) in cloudflare-email-service of swyxio/skills.
- SKILL.md
- references/cli-and-mcp.md
- references/deliverability.md
- references/rest-api.md
- references/routing.md
- references/sending.md
Open the folder on GitHubat commit 038ef34
Compare with similar skills
Cloudflare Email Service 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Cloudflare Email Service this skillswyxio/skills | 176 | — | ~684 | Automated safety check: Pass | MIT | |
| Cloudflare Email Servicehodgef/apiker | 127 | 2 repos | ~2k | Automated safety check: Pass | MIT | |
| Cloudflare Email Servicecloudflare/skills | 3k | 2 repos | ~1.7k | Automated safety check: Pass | Apache-2.0 | |
| Openmaopenma-ai/open-managed-agents | 315 | — | ~854 | Automated safety check: Pass | Apache-2.0 | |
| Prepare Cloudflare Production DeploymentLubomirGeorgiev/cloudflare-workers-nextjs-saas-template | 786 | — | ~5.9k | Automated safety check: Notes | MIT | |
| Cloudflare Browser Renderingeinverne/dotfiles | 121 | — | ~4.9k | Automated safety check: Pass | GPL-3.0 |
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Related
Works with
Categories
Questions about Cloudflare Email Service
What does Cloudflare Email Service do?
Implement or debug Cloudflare Email Service sending, Email Routing, or an Agents SDK email handler. Cloudflare Email Service is an agent skill from swyxio/skills. Implement or debug Cloudflare Email Service sending, Email Routing, or an Agents SDK email handler.
When should I use Cloudflare Email Service?
Cloudflare Email Service fits situations like: the Workers email binding; email Service REST API; inbound email() handlers; domain onboarding.
How do I install Cloudflare Email Service in Claude Code?
Run `npx skills add swyxio/skills --skill cloudflare-email-service -a claude-code`. Or copy the skill folder (cloudflare-email-service in swyxio/skills) into .claude/skills/cloudflare-email-service in your project. Claude Code loads it when a task matches its description.
How do I install Cloudflare Email Service in Codex?
Run `npx skills add swyxio/skills --skill cloudflare-email-service -a codex`. Or copy the skill folder (cloudflare-email-service in swyxio/skills) into .agents/skills/cloudflare-email-service in your project. Codex loads it when a task matches its description.
Can I use Cloudflare Email Service 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 swyxio/skills --skill cloudflare-email-service -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/cloudflare-email-service, .gemini/skills/cloudflare-email-service, .github/skills/cloudflare-email-service and .opencode/skills/cloudflare-email-service in your project.
What does Cloudflare Email Service need to run?
SKILL.md names no scripts, command-line tools or credentials: Cloudflare Email Service is instructions for the agent only.
Does Cloudflare Email Service 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 Cloudflare Email Service 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 Cloudflare Email Service use?
Cloudflare Email Service is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Cloudflare Email Service use?
About 684 tokens (SKILL.md is roughly 2.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 9k tokens, read only when the agent opens those files.
What are the alternatives to Cloudflare Email Service?
Skills that share tags, products or a category with Cloudflare Email Service: Cloudflare Email Service (hodgef/apiker, 127 stars), Cloudflare Email Service (cloudflare/skills, 3k stars), Openma (openma-ai/open-managed-agents, 315 stars) and Prepare Cloudflare Production Deployment (LubomirGeorgiev/cloudflare-workers-nextjs-saas-template, 786 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Cloudflare Email Service?
swyxio (a GitHub user) maintains it in swyxio/skills, which has 176 GitHub stars. The repository holds 89 skills in this directory. The repository was last updated on October 5, 2026.
Source: swyxio/skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.