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AISkills402 — vCard from E-mail Signature Skill File
x402
AISkills402 — vCard from E-mail Signature Skill File is a paid API for AI agents from api.aiskills402.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-23).
Purchases and downloads the 'vCard from E-mail Signature' SKILL.md file, paid once in USDC over x402 on Base, with permanent re-download access.
Price / call$0.03
Success—
StatusUnknown
How this service works
vCard from E-mail Signature — Turns the signature block of an e-mail (English, Bulgarian, German or another language) into a vCard 4.0 contact card, answered as the card text only. Follows RFC 6350 where plain models slip - VERSION:4.0 right after BEGIN, FN always present, N with exactly five components, ADR with exactly seven, commas, semicolons and backslashes escaped in text values, phone numbers as tel URIs. What the signature does not say stays out - no invented surname, no guessed country…
Output
Returns a JSON object containing the SKILL.md file content (UTF-8 encoded), the skill's human-readable name ('vCard from E-mail Signature'), its slug identifier ('vcard-from-signature'), a SHA256 checksum for integrity verification, the semantic version, a blockchain settlement transaction hash confirming USDC payment on Base, and a unique re-download token with URL for future access without repayment.
Example use cases
Equip agent with vCard extraction skill
“I want my AI agent to be able to take someone's email signature and produce a proper vCard contact file from it — can you purchase the vcard-from-signature SKILL.md from AISkills402 and load it up?”
One-time skill purchase for CRM automation
“We're building a pipeline that auto-adds contacts to our CRM whenever a new email arrives — buy the vCard from email signature skill from AISkills402 so the agent knows how to parse signatures into structured contact records.”
Re-download previously purchased skill
“I already bought the vCard from email signature skill from AISkills402 — can you grab the latest version of the SKILL.md file again using our re-download token?”
Technical details
Endpoint
GEThttps://api.aiskills402.com/v1/skills/vcard-from-signature/file?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an AI agent needs a tested, ready-to-use SKILL.md instruction file specifically for extracting vCard contact data from email signatures, and is able to execute a one-time USDC micropayment over x402 on Base. Prefer this over building custom parsing logic when you want a curated, versioned skill with permanent re-download rights and no subscription overhead.
Side effects
- Payment not settled on Base — transaction pending or insufficient USDC balance causes 402 or payment failure
- Invalid or malformed x402 payment header — returns authentication/payment error
- Skill slug not found — unlikely for this fixed endpoint but would return 404
- Network timeout reaching api.aiskills402.com — returns connection error
- Re-download token already used or expired — returns unauthorized error on redownload endpoint
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"file": {
"name": "SKILL.md",
"content": "<the SKILL.md file>",
"encoding": "utf-8"
},
"name": "vCard from E-mail Signature",
"skill": "vcard-from-signature",
"sha256": "<sha256 of SKILL.md>",
"receipt": {
"tx": "0x<settlement transaction>",
"settled": true
},
"version": "1.0.0",
"redownload": {
"url": "<api>/v1/purchases/<token>",
"token": "<64 hex chars>"
}
}
}Tags
x402
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