Arkham API
Curl+jq cookbook for the Arkham Intelligence blockchain-analytics API.
Test report
- Verdict
- Works with setup
- Score
- Tested
- Jul 15, 2026
- Environment
- Claude Code 2.x (agent harness)
- Upstream re-checked
- Jul 20, 2026 · 134409e
⚠ This skill is no longer available upstream. Our re-check on Aug 10, 2026 couldn't find it any more (repo unreachable/deleted). The test below is what we measured on Jul 15, 2026 and we're leaving it up as a record — but there is nothing left to install, so we've removed the command.
Live-tested against the real Arkham API: the skill's documented `API-Key:` header returns a real 'Could not verify API Key' response, while a naive `Authorization: Bearer` guess gets an unrelated 'sign up for an api key' error that isn't even recognized as an auth attempt — the skill's pattern is verified correct against a live baseline miss. But its own `ARKHAM_API_DOCUMENTATION.md` reference lives outside the copyable skill folder, and real use needs a paid Arkham key the SKILL.md doesn't flag.
Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works
- Installs cleanly 3/5
- Triggers reliably 5/5
- Output vs. baseline 8/10
- Docs & honesty 4/5
What Arkham API does
Gives Claude a ready-made set of curl/jq recipes for the Arkham Intelligence API covering wallet lookups, whale-transfer tracking, entity balances, and token-holder analysis across 10+ chains. Triggers when a user asks to analyze a crypto address, track whale movements, or investigate on-chain flows. Requires the user's own Arkham API key, and full functionality needs Arkham's paid tier.
How to install Arkham API
Nothing to install: the source repository no longer has this skill. If the author brings it back, our daily re-check will pick it up and the command will reappear here.
Commands — how to trigger Arkham API
-
/arkham-apiCurl+jq cookbook for the Arkham Intelligence blockchain-analytics API.
It also activates on plain-language prompts like these:
-
Pull Wintermute's cross-chain wallet balances using the Arkham API -
Help me track whale transfers on-chain with curl and jq against Arkham -
What's the right auth header for querying Arkham Intelligence's API?
Frequently asked questions
- Is the Arkham API skill free?
- Yes. The skill itself is free from Vyntral/arkham-intelligence-claude-skill. SkillProof publishes the install command and an independent test verdict at no cost.
- Does Arkham API work with Claude Code?
- We tested it with Claude Code 2.x (agent harness) on Jul 15, 2026. Verdict: Works with setup. Live-tested against the real Arkham API: the skill's documented `API-Key:` header returns a real 'Could not verify API Key' response, while a naive `Authorization: Bearer` guess gets an unrelated 'sign up for an api key' error that isn't even recognized as an auth attempt — the skill's pattern is verified correct against a live baseline miss. But its own `ARKHAM_API_DOCUMENTATION.md` reference lives outside the copyable skill folder, and real use needs a paid Arkham key the SKILL.md doesn't flag.
- What is the Arkham API SkillProof Score?
- 8.0/10 — installs cleanly 3/5, triggers reliably 5/5, output vs. baseline 8/10, docs & honesty 4/5.
- How do I install Arkham API?
- Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
- Can I use Arkham API with Cursor, Copilot, Gemini CLI, Codex or other AI tools?
- The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.