1gateway Domain API
The Domain API from 1gateway — 1 operation(s) for domain.
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OpenAPI Specification
openapi: 3.2.0
info:
title: 1gateway Domain API
version: 0.1.1
description: '1gateway lets AI agents buy the data and APIs they need, one call at a time: no signup, no API key, paid per request with USDC on Base or Solana via x402. Coverage: company and compliance checks (sanctions, KYB, SEC filings, Korean companies), Korean real estate, trade and macro data, onchain and market data, and agent utilities such as document-to-Markdown. Every response names its source. Failed calls are never charged.'
x-guidance: 'Use this API when an agent needs data as English JSON with pay-per-call access and no signup. Common tasks: Korea apartment sale transactions and district price summaries, Korean public holidays, Korea company KYB (company resolve, profile, NTS business status, DART filings, supplier check), Korean HWP/HWPX to Markdown, web page to Markdown (web read), and document extract (PDF, DOCX, HWP/HWPX or web page to structured JSON). Current coverage is South Korea: apartment sale prices (MOLIT), exports/imports and 10-day export flash (Korea Customs), Bank of Korea statistics (ECOS), weather forecast by lat/lon (KMA), holidays (KASI); more APIs and countries are coming. Base onchain reads: token risk, wallet balances, token info, transaction status. Also: document → Markdown conversion for web pages, PDF, DOCX and Korean HWP/HWPX (price by detected type, decided before payment). Every /v1 endpoint is paid: call it, receive HTTP 402 with PAYMENT-REQUIRED, pay with an x402 client (USDC on Base or Solana, same price) and retry. No charge on failure: settlement happens only on 2xx; 4xx/5xx are never charged. Agent guide: https://1gateway.dev/agents.md. Status: https://1gateway.dev/status. MCP (Streamable HTTP) is available at https://1gateway.dev/mcp: initialize and tools/list are free, tools/call is paid via x402 _meta.'
contact:
email: contact@1gateway.dev
servers:
- url: https://1gateway.dev
tags:
- name: Domain
paths:
/v1/domain/lookup:
get:
operationId: domain_lookup
summary: 'Domain lookup: DNS records, mail provider, SPF/DMARC, RDAP registrar…'
description: 'Use when an agent must check a domain: does it resolve, who hosts its DNS and mail, is email authenticated, how old is it, when does it expire. Input: domain (e.g. example.com; URLs accepted). Output: JSON DNS records (A, AAAA, CNAME, MX, NS, TXT, CAA, SOA), mail provider, parsed SPF and DMARC, DNS provider, and RDAP registration (registrar, created, expires, age in days, status, DNSSEC). No contact data. Example: ?domain=google.com'
x-payment-info:
price:
mode: fixed
currency: USD
amount: '0.004500'
protocols:
- x402: {}
x-x402:
price: $0.0045
scheme: exact
network: eip155:8453
networks:
- eip155:8453
- solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp
asset: USDC
kind: single
source: Cloudflare 1.1.1.1 DoH + registry RDAP (IANA bootstrap)
parameters:
- name: domain
in: query
required: true
description: Public domain or hostname (punycode for IDNs, e.g. xn--...); a URL is reduced to its hostname. Internal/reserved names → 400 (not charged)
schema:
type: string
maxLength: 2048
example: google.com
responses:
'200':
description: OK (payment settled). Example is a trimmed real output.
content:
application/json:
schema:
type: object
properties:
domain:
type: string
resolves:
type: boolean
dnsStatus:
type: string
dns:
type: object
additionalProperties:
type: array
items:
type: string
mx:
type: array
items:
type: object
properties:
priority:
type: integer
host:
type: string
mail:
type: object
properties:
acceptsMail:
type: boolean
provider:
type: string
spf:
type: object
properties:
present:
type: boolean
record:
type: string
multipleRecords:
type: boolean
includes:
type: array
items:
type: string
all:
type: string
policy:
type: string
lookupMechanisms:
type: integer
dmarc:
type: object
properties:
present:
type: boolean
policy:
type: string
subdomainPolicy:
type: 'null'
pct:
type: integer
aggregateReportTargets:
type: integer
forensicReportTargets:
type: integer
alignmentDkim:
type: string
alignmentSpf:
type: string
dnsProvider:
type: string
verificationTokens:
type: array
items:
type: string
registration:
type: object
properties:
available:
type: boolean
registeredDomain:
type: string
source:
type: string
domain:
type: string
registrar:
type: object
properties:
name:
type: string
ianaId:
type: string
created:
type: string
updated:
type: string
expires:
type: string
ageDays:
type: integer
daysUntilExpiry:
type: integer
status:
type: array
items:
type: string
nameservers:
type: array
items:
type: string
dnssec:
type: boolean
cache:
type: string
sources:
type: array
items:
type: string
notes:
type: array
items:
type: string
required:
- domain
- resolves
- dnsStatus
- dns
- mx
- mail
- dnsProvider
- verificationTokens
- registration
- cache
- sources
- notes
example:
domain: google.com
resolves: true
dnsStatus: NOERROR
dns:
A:
- 192.178.232.113
AAAA:
- 2607:f8b0:4023:1431::64
MX:
- 10 smtp.google.com.
NS:
- ns3.google.com.
mx:
- priority: 10
host: smtp.google.com
mail:
acceptsMail: true
provider: Google Workspace
spf:
present: true
record: v=spf1 include:_spf.google.com ~all
multipleRecords: false
includes:
- _spf.google.com
all: ~all
policy: softfail
lookupMechanisms: 1
dmarc:
present: true
policy: reject
subdomainPolicy: null
pct: 100
aggregateReportTargets: 1
forensicReportTargets: 0
alignmentDkim: r
alignmentSpf: r
dnsProvider: Google
verificationTokens:
- apple-domain-verification
registration:
available: true
registeredDomain: google.com
source: https://rdap.verisign.com/com/v1/
domain: google.com
registrar:
name: MarkMonitor Inc.
ianaId: '292'
created: '1997-09-15T04:00:00Z'
updated: '2019-09-09T15:39:04Z'
expires: '2028-09-14T04:00:00Z'
ageDays: 10616
daysUntilExpiry: 705
status:
- client delete prohibited
nameservers:
- ns1.google.com
dnssec: false
cache: miss
sources:
- 'DNS: Cloudflare 1.1.1.1 DNS-over-HTTPS'
notes:
- Registrant/admin/tech contacts are intentionally not returned.
'400':
description: Invalid or missing parameters, or URL/domain not allowed (validated before payment where possible; not charged)
content:
application/json:
schema:
type: object
properties:
error:
type: string
description: Machine-readable error code, e.g. bad_request, not_found, upstream_error, upstream_unreachable, upstream_not_configured
examples:
- bad_request
message:
type: string
description: Human-readable explanation
examples:
- month must be YYYYMM (e.g. 202409)
required:
- error
'402':
description: Payment Required (x402 v2). Returned for every unpaid request. PAYMENT-REQUIRED response header carries base64 JSON PaymentRequired; retry with PAYMENT-SIGNATURE.
'500':
description: Unexpected server error (not charged)
content:
application/json:
schema:
type: object
properties:
error:
type: string
description: Machine-readable error code, e.g. bad_request, not_found, upstream_error, upstream_unreachable, upstream_not_configured
examples:
- bad_request
message:
type: string
description: Human-readable explanation
examples:
- month must be YYYYMM (e.g. 202409)
required:
- error
'502':
description: Upstream source returned an error or an unreadable response (not charged)
content:
application/json:
schema:
type: object
properties:
error:
type: string
description: Machine-readable error code, e.g. bad_request, not_found, upstream_error, upstream_unreachable, upstream_not_configured
examples:
- bad_request
message:
type: string
description: Human-readable explanation
examples:
- month must be YYYYMM (e.g. 202409)
required:
- error
'503':
description: Endpoint temporarily disabled or upstream not configured on this server; no 402 is issued (not charged). Check /status, retry later
content:
application/json:
schema:
type: object
properties:
error:
type: string
description: Machine-readable error code, e.g. bad_request, not_found, upstream_error, upstream_unreachable, upstream_not_configured
examples:
- bad_request
message:
type: string
description: Human-readable explanation
examples:
- month must be YYYYMM (e.g. 202409)
required:
- error
'504':
description: Upstream source timed out or was unreachable (not charged). Retry after 1-5 min with backoff
content:
application/json:
schema:
type: object
properties:
error:
type: string
description: Machine-readable error code, e.g. bad_request, not_found, upstream_error, upstream_unreachable, upstream_not_configured
examples:
- bad_request
message:
type: string
description: Human-readable explanation
examples:
- month must be YYYYMM (e.g. 202409)
required:
- error
tags:
- Domain
x-x402-network: eip155:8453
x-billing-policy: 'No charge on failure: payment is settled only after the endpoint returns a 2xx response. Any 4xx or 5xx (bad input, no data, upstream error, timeout, disabled endpoint) is not settled, so the signed payment is never collected. Input is validated before the 402 wherever possible. Over MCP, a tool result with isError is not settled either.'
x-error-codes:
- status: 400
codes:
- bad_request
- url_not_allowed
- bad_checksum
- not_a_contract
meaning: Invalid or missing parameters, or a URL/domain that is not allowed.
retry: Fix the input; do not retry as is.
- status: 402
codes: []
meaning: Payment required (x402 v2). The PAYMENT-REQUIRED header holds the exact price.
retry: Pay with an x402 client and retry with PAYMENT-SIGNATURE.
- status: 403
codes:
- not_bok_authored
meaning: Requested table/resource is not served (e.g. statistics not authored by the Bank of Korea).
retry: Do not retry.
- status: 404
codes:
- not_found
- tx_not_found
- tx_not_mined
meaning: No data for the requested period/code yet.
retry: Try an earlier period or another code.
- status: 413
codes:
- too_large
meaning: Document is larger than this server's conversion cap (checked before payment).
retry: Send a smaller document.
- status: 415
codes:
- unsupported_type
- type_mismatch
meaning: Document type not supported or not matching the declared type (before payment).
retry: Do not retry as is.
- status: 502
codes:
- upstream_error
- upstream_bad_response
- upstream_http_error
- rpc_unavailable
- source_http_error
meaning: The upstream source (government API, RPC, target site) returned an error or unreadable data.
retry: Retry after 30-60 s with backoff.
- status: 503
codes:
- endpoint_disabled
- upstream_not_configured
- payment_not_configured
meaning: Endpoint temporarily disabled on this server, or its upstream is not configured. No 402 is issued.
retry: Check /status; retry later.
- status: 504
codes:
- upstream_unreachable
meaning: The upstream source timed out or was unreachable (Korean public data APIs have occasional outages, esp. holidays).
retry: Retry after 1-5 min with backoff.