Coinslot

Coinslot is an x402-native service at https://coinslot.dev, indexed from the x402 Bazaar (Coinbase's public discovery directory). It charges callers itself in USDC on Base and is paid directly at its own wallet; Monex Protocol passes your request and payment headers through untouched. 12 endpoints listed.

Base

Offers

Offer	Endpoint	Price
Api 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 }.	`/m/bz-coinslot-dev/api/convert`	0.002 USDC
Api Cron Parse a 5-field cron expression: get a plain-English explanation and the next N run times (UTC). POST { expression, count?, from? }.	`/m/bz-coinslot-dev/api/cron`	0.002 USDC
Api 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).	`/m/bz-coinslot-dev/api/email-verify`	0.003 USDC
Api Extract Pull structured data out of raw text: emails, URLs, IPv4/IPv6, phone numbers, dates. Deduplicated with counts. POST { text } (max 500KB).	`/m/bz-coinslot-dev/api/extract`	0.003 USDC
Api 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.	`/m/bz-coinslot-dev/api/feed-to-json`	0.004 USDC
Api 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).	`/m/bz-coinslot-dev/api/html-to-markdown`	0.005 USDC
Api 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 }.	`/m/bz-coinslot-dev/api/json-schema-validate`	0.003 USDC
Api Markdown To Html Render Markdown (GitHub-flavored: tables, fenced code, task lists) to clean HTML with raw inline HTML stripped. POST { markdown } (max 500KB).	`/m/bz-coinslot-dev/api/markdown-to-html`	0.003 USDC
Api Qr Generate a QR code as standalone SVG. POST { text, ecLevel?: 'L'\|'M'\|'Q'\|'H', margin?: 0-8, dark?, light? } (text max 2KB).	`/m/bz-coinslot-dev/api/qr`	0.005 USDC
Api 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).	`/m/bz-coinslot-dev/api/read-page`	0.005 USDC
Api 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).	`/m/bz-coinslot-dev/api/timezone`	0.002 USDC
Api 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).	`/m/bz-coinslot-dev/api/validate-ids`	0.003 USDC

Machine-readable: openapi.json with x-payment-info offers.

Try it live

Run the full MPP flow from your browser: catch the 402, sign the payment with your wallet, and watch it settle on-chain.

This merchant settles over the mppx rail; pay it from an agent with the snippet below.

Pay with an agent

Any MPP or x402-compatible client works. With mppx, payment is automatic:

import { Mppx, evm } from 'mppx/client'
import { privateKeyToAccount } from 'viem/accounts'

const mppx = Mppx.create({
  methods: [evm({
    account: privateKeyToAccount(process.env.KEY),
    currencies: [evm.assets.base.USDC],
  })],
})

const res = await mppx.fetch('https://api.meshgateway.co/m/bz-coinslot-dev/api/convert')
// 402 challenge signed and settled automatically; response includes Payment-Receipt

Or inspect the challenge yourself:

curl -i https://api.meshgateway.co/m/bz-coinslot-dev/api/convert
# HTTP/1.1 402 Payment Required
# WWW-Authenticate: Payment id="…", method="evm", intent="charge", …