AISKILLS402

Cold Email

Cold Email is a tested SKILL.md that writes a short, honest first outreach message to a stranger in business, in the recipient's language, with a subject line, one specific reason for writing and one small ask; an agent buys it once for $0.03 over x402.

$0.03once · USDC on Base

Price as loaded on this page. The 402 response your agent receives is authoritative.

Tested 2026-09-30No code, no hidden instructionsv1.0.0 · 6.1 KB · perpetual license
How your agent buys itShare

Use it when

Writes a short, honest first outreach message to a stranger in business, in the recipient's language, with a subject line, one specific reason for writing and one small ask. Use when asked to write a cold email, a first outreach message, a sales or partnership introduction, or a prospecting note, in any language.

Not for

Bulk or automated mass mailing, follow-up sequences, or inventing personal details about a recipient; it writes one honest first message from the facts you give it.

Tested, honestly

Tested 2026-09-30 with a strong and a weak model.

Strong · claude-sonnet-5-5 (Claude Code alias "sonnet")
6 of 6 cases pass (en, bg, de, es, ru, thin brief). Right language, formal address, 60-110 words, one ask, easy exit, and no invented facts: with almost no brief it wrote a role-based reason and said it was writing without prior contact.
Weak · claude-haiku-4-5-20251001 (Claude Code alias "haiku")
6 of 6 pass the mechanical checks, but reading the texts shows real flaws: invents claims not in the brief ("most bakery owners I work with", "no massive minimums", "no surprise bills"), flatters ("great milestone"), ignores the formal-address rule in de/es/bg greetings (Hallo, Hola Laura, first-name only), leaves the Russian email without a greeting and with an English "Subject:" label, and on the thin brief does not say it is a first contact. Review its drafts before use.

Full test summary

What is in the file

  • Hard rules
  • Shape of the message
  • Subject line
  • Words to avoid
  • Format
  • When the brief is thin
  • Check before you answer

Languages

Any language.

How to buy

Any x402 client works. Without a payment header the endpoint answers 402 and tells your agent what it costs. Sign it, repeat the request with PAYMENT-SIGNATURE, and the file comes back.

Agent (HTTP)

curl -i https://api.aiskills402.com/v1/skills/cold-email/file

Agent (MCP)

Connect https://mcp.aiskills402.com/mcp, then use the free tools get_skill (card and payment requirements) and redownload_skill. The payment itself goes over HTTP.

I am a person

Honestly: you need an agent with a USDC wallet, or a small script, plus the x402-buyer skill. There is no card checkout yet. The steps are in the docs.

The file

Version
1.0.0
Payment
x402 · USDC · base
Updates
free, new versions included
Size
6.1 KB (6199 bytes)
SHA-256
e1ae2d370e1f599ee27d68f379801979a8337996c7ee6ebe587df59625a9ea7a
Updated
2026-09-30

License

Perpetual, non-exclusive; use and modify for yourself incl. paid work; no resale or republishing. Holder: Georgi Kalchev, aiskills402.com. Full terms.

Versions

Current version 1.0.0, updated 2026-09-30. Whoever bought an earlier version gets new ones free through the same re-download token.

FAQ

What does one email look like?

A subject line, a short body of roughly 60 to 110 words in the recipient's language, one specific reason for writing and a single small ask, with an easy way to say no. It does not stack several requests into one message.

What happens when I give it almost no information?

It does not make up a story. On a nearly empty brief, the strong model wrote a role-based reason for the contact and stated openly that it was writing without prior contact. Give it real facts about the recipient and your offer for a sharper message.

Is the small model good enough for this?

Read every draft. Claude Haiku passed our mechanical checks but added claims that were not in the brief, such as what most customers say, flattered the recipient and skipped the formal form of address in German, Spanish and Bulgarian. Claude Sonnet did none of that.

Related skills

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Read this page as Markdown: /skills/cold-email.md.