Coinslot — the vending machine for machines

Measured conclusion: Deep-tested. L2 outcome: tools_ok.

13 micro-tools for agents: read pages, verify email, convert, validate, diff, extract. AI-operated.

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Copy this into your MCP client config:

{
  "mcpServers": {
    "Coinslot — the vending machine for machines": {
      "url": "https://coinslot.dev/mcp",
      "transport": "streamable-http"
    }
  }
}

Measured tools (13)

• convert

  Convert an array of JSON objects to CSV (nested keys become dot-path columns) or CSV back to JSON. POST { direction: 'json-to-csv'|'csv-to-json', data }. Price: $0.002/call with credits key; free demo without (2KB input cap).

  Parameters:

  • direction (required) — string
  • data (required) — Array of objects (json-to-csv) or CSV string (csv-to-json)

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• email_verify

  Check an email address: RFC syntax, live MX records via DNS-over-HTTPS, and disposable-domain screening. POST { email } or { emails: [...] } (max 20). Price: $0.003/call with credits key; free demo without (2KB input cap).

  Parameters:

  • email — string — Single address
  • emails — array

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• html_to_markdown

  Convert HTML to clean Markdown: headings, links, images, lists, tables, code blocks, emphasis. Strips scripts, styles, and comments. POST { html } (max 500KB). Price: $0.005/call with credits key; free demo without (2KB input cap).

  Parameters:

  • html (required) — string — HTML document or fragment, max 500KB

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• json_schema_validate

  Validate a JSON document against a JSON Schema (draft-07 core subset: types, required, enums, ranges, patterns, nesting, anyOf/allOf/oneOf). Returns all violations with paths. POST { schema, data }. Price: $0.003/call with credits key; free demo without (2KB input cap).

  Parameters:

  • schema (required) — object — JSON Schema (draft-07 core subset)
  • data (required) — Document to validate

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• diff

  Line-based diff of two texts. Returns unified diff plus structured changes (added/removed/unchanged counts and hunks). POST { a, b, context? } (max 200KB each). Price: $0.002/call with credits key; free demo without (2KB input cap).

  Parameters:

  • a (required) — string
  • b (required) — string
  • context — integer

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• cron

  Parse a 5-field cron expression: get a plain-English explanation and the next N run times (UTC). POST { expression, count?, from? }. Price: $0.002/call with credits key; free demo without (2KB input cap).

  Parameters:

  • expression (required) — string — 5-field cron or @alias
  • from — string — ISO date to project from
  • count — integer

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• qr

  Generate a QR code as standalone SVG. POST { text, ecLevel?: 'L'|'M'|'Q'|'H', margin?: 0-8, dark?, light? } (text max 2KB). Price: $0.005/call with credits key; free demo without (2KB input cap).

  Parameters:

  • text (required) — string
  • dark — string — hex color
  • light — string — hex color
  • margin — integer
  • ecLevel — string

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• feed_to_json

  Parse an RSS 2.0 or Atom feed into clean JSON: title, items with link/date/summary, HTML stripped. POST { xml } (max 1MB) or { url } to fetch. Price: $0.004/call with credits key; free demo without (2KB input cap).

  Parameters:

  • url — string — Feed URL to fetch instead
  • xml — string — Feed XML, max 1MB

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• extract

  Pull structured data out of raw text: emails, URLs, IPv4/IPv6, phone numbers, dates. Deduplicated with counts. POST { text } (max 500KB). Price: $0.003/call with credits key; free demo without (2KB input cap).

  Parameters:

  • text (required) — string — Raw text, max 500KB

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• markdown_to_html

  Render Markdown (GitHub-flavored: tables, fenced code, task lists) to clean HTML with raw inline HTML stripped. POST { markdown } (max 500KB). Price: $0.003/call with credits key; free demo without (2KB input cap).

  Parameters:

  • markdown (required) — string — GitHub-flavored Markdown, max 500KB

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• validate_ids

  Validate identifiers with real checksum math: credit card (Luhn + brand), IBAN (mod-97), EAN-13/UPC-A, ISBN-10/13, UUID (with version). POST { type, value } or { items: [{type, value}] } (max 50). Price: $0.003/call with credits key; free demo without (2KB input cap).

  Parameters:

  • type — string
  • items — array
  • value — string

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• timezone

  Convert a timestamp between IANA timezones with DST handled correctly. Returns local times, UTC offsets, weekday, and hour-of-day per zone. POST { time?, from?, to } — to is a zone or array (max 20). Price: $0.002/call with credits key; free demo without (2KB input cap).

  Parameters:

  • to (required) — IANA zone or array of zones (max 20)
  • from — string — IANA zone the input wall-clock is in
  • time — ISO string, epoch, or 'now'

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• read_page

  Fetch a public URL and return its content as clean Markdown plus title and metadata. One call instead of fetch + parse + convert. POST { url, maxBytes? } (default 1MB cap). Price: $0.005/call with credits key; free demo without (2KB input cap).

  Parameters:

  • url (required) — string — Public http(s) URL
  • maxBytes — integer

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

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