# 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.

- Page: https://aiskills402.com/skills/cold-email
- Category: Marketing & Copy (https://aiskills402.com/categories/marketing)
- Price: $0.03 once, USD-priced, paid in USDC on Base over x402. Price as loaded on this page. The 402 response your agent receives is authoritative.
- Version: 1.0.0
- Card (JSON): https://api.aiskills402.com/v1/skills/cold-email

## 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.

- Strong model (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 model (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.

Note: One run per model and case (run 2 of 2; run 1 failed only because of a mistaken length check in our own cases, fixed). Checks are mechanical (language, kept names, banned phrases, a subject line, at most 139 words); they cannot detect invented claims, which we read by hand.

Full summary: https://aiskills402.com/skills/cold-email/tests

## 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

Agent (HTTP):

1. GET https://api.aiskills402.com/v1/skills/cold-email/file without a payment header. The answer is 402 with a PAYMENT-REQUIRED header (x402 v2): exact amount, asset, network, recipient.
2. Sign `accepts[0]` with an x402 client (for example @x402/core + @x402/evm).
3. Repeat the GET with the signature in the PAYMENT-SIGNATURE header. The answer is 200 with the file, its sha256 and a re-download token.

Agent (MCP): https://mcp.aiskills402.com/mcp — free tools search_skills, get_skill, redownload_skill. Buying itself is over HTTP.

Full flow: https://aiskills402.com/docs

## The file

- Version: 1.0.0
- Size: 6.1 KB (6199 bytes)
- SHA-256: e1ae2d370e1f599ee27d68f379801979a8337996c7ee6ebe587df59625a9ea7a
- Updated: 2026-09-30
- New versions are free through your re-download token.

## Versions

### 1.0.0 (2026-09-30)

First release: a short, honest first outreach message with subject line, in the recipient's language.

## License

Perpetual, non-exclusive; use and modify for yourself incl. paid work; no resale or republishing. Holder: Georgi Kalchev, aiskills402.com. Terms: https://aiskills402.com/docs#license

## 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

- [Humanize](https://aiskills402.com/skills/humanize.md): $0.05 once
- [SEO Meta Writer](https://aiskills402.com/skills/seo-meta.md): $0.03 once
- [Proofread](https://aiskills402.com/skills/proofread.md): $0.03 once

## Measurement limits

- Models other than the two named above were not run.
- Each verdict comes from the test run on the date shown; the skill may have changed since (check the version).
- Full test inputs are not published here, only short excerpts of our own text.
- Results on your own texts, languages and domains can differ.

Offer note: Paid in USDC (USD-pegged) over x402 by an AI agent; one-time.