Cloudflare Skills is a collection of instructions and tools that help coding agents build on Cloudflare Workers, the Agents SDK, and other Cloudflare developer services. It is for agents and developers using Cloudflare’s platform. The catalogue entries package the project’s guidance as skills, commands, rules, plugins, and MCP tools.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add cloudflare/skills --skill agents-sdkgit clone --depth 1 https://github.com/cloudflare/skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/cloudflare/skills/agents-sdk)<a href="https://agentmods.dev/skills/cloudflare/skills/agents-sdk"><img src="https://agentmods.dev/badge/skills/cloudflare/skills/agents-sdk/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/cloudflare/skills/agents-sdk"><img src="https://agentmods.dev/badge/skills/cloudflare/skills/agents-sdk.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00019 | $0.02896 |
| Opus 5.5 | $0.00008 | $0.01158 |
| Sonnet 5.5 | $0.00004 | $0.00579 |
| Haiku 4.5 | $0.00002 | $0.00290 |
Grade A, and why
agents-sdk scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 18d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
Custom routing: use `getAgentByName(env.MyAgent, "instance-id")` then `agent.fetch(request)`. Copies of this mod
4 near-identical copies found in the catalogue:
- agents-sdk — 100% identical, 93 lines differ
- agents-sdk — 100% identical, 93 lines differ
- agents-sdk — 100% identical, 175 lines differ
- agents-sdk — 100% identical, 93 lines differ
How it starts
The opening of the file, as written. The whole thing — 203 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Cloudflare Agents SDK
Your knowledge of the Agents SDK may be outdated. Prefer retrieval over pre-training for any Agents SDK task.
Retrieval Sources
Cloudflare docs: https://developers.cloudflare.com/agents/index.md
| Topic | Docs URL | Use for |
|---|---|---|
| Getting started | Quick start | First agent, project setup |
| Adding to existing project | Add to existing project | Install into existing Workers app |
| Configuration | Configuration | wrangler.jsonc, bindings, assets, deployment |
| Agent class | Agents API | Agent lifecycle, patterns, pitfalls |
| State | Store and sync state | setState, validateStateChange, persistence |
| Routing | Routing | URL patterns, routeAgentRequest |
| Callable methods | Callable methods | @callable, RPC, streaming, timeouts |
| Scheduling | Schedule tasks | schedule(), scheduleEvery(), cron |
| Workflows | Run workflows | AgentWorkflow, durable multi-step tasks |
| HTTP/WebSockets | WebSockets | Lifecycle hooks, hibernation |
| Chat agents | Chat agents | AIChatAgent, streaming, tools, persistence |
| Client SDK | Client SDK | useAgent, AgentClient, state, RPC, HTTP |
| Client tools | Client tools | Client-side tools, autoContinueAfterToolResult |
| Server-driven messages | Autonomous responses | saveMessages, waitUntilStable, server-initiated turns |
| Resumable streaming | Chat agents | Stream recovery on disconnect |
| Email routing, secure reply resolver | ||
| MCP client | MCP client | Connecting to MCP servers |
| MCP server | MCP server | Building MCP servers with createMcpHandler |
| MCP transports | MCP transports | Streamable HTTP, SSE, RPC transport options |
| Securing MCP servers | Securing MCP | OAuth, proxy MCP, hardening |
| Human-in-the-loop | Human-in-the-loop | Workflow approvals, elicitation, timeout handling |
| Durable execution | Durable execution | runFiber(), stash(), surviving DO eviction |
| Queue | Queue | Built-in FIFO queue, queue() |
| Retries | Retries | this.retry(), backoff/jitter |
| Observability | Observability | Diagnostics-channel events |
| Push notifications | Push notifications | Web Push + VAPID from agents |
| Webhooks | Webhooks | Receiving external webhooks |
| Cross-domain auth | Cross-domain auth | WebSocket auth, tokens, CORS |
| Readonly connections | Readonly | shouldConnectionBeReadonly |
| Voice | Voice | Experimental STT/TTS, withVoice |
| Browse the web | Browser tools | Experimental CDP browser automation |
| Think | Think | Experimental higher-level chat agent class |
| Migrations | AI SDK v5, AI SDK v6 | Upgrading @cloudflare/ai-chat |
What ships with it
19 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- references/browse-the-web.md 1.6 KB
- references/callable.md 2.1 KB
- references/client-sdk.md 1.2 KB
- references/codemode.md 2.8 KB
- references/configuration.md 1.8 KB
- references/durable-execution.md 1.7 KB
- references/email.md 3.5 KB
- references/human-in-the-loop.md 929 B
- references/mcp.md 1.3 KB
- references/observability.md 1.3 KB
- references/queue-retries.md 1.4 KB
- references/routing.md 1.8 KB
- references/server-driven-messages.md 868 B
- references/state-scheduling.md 1.5 KB
- references/streaming-chat.md 1.4 KB
- references/think.md 2.9 KB
- references/voice.md 1.9 KB
- references/webhooks-push.md 2.4 KB
- references/workflows.md 2.3 KB
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 18d ago Changed 95890d0c50e3
- 1mo ago Changed · -19 lines · -68 tokens per session 59332861a1da
- 1mo ago First seen · 222 lines · 87 tokens per session scan A a05244d3cfb2
agents-sdk is a skill published in the GitHub repository cloudflare/skills (3,108 stars, last pushed today), licensed Apache-2.0. It adds 19 tokens to every session and 2,896 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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