StableDomains

Check availability and USD price for a name across TLDs. Each result has premium (boolean; premium = registry price + 12%) and renewal_price (USD/yr). If the name is taken, suggestions[] lists close AVAILABLE alternatives (live-checked, cheapest first).

For a taken name: affiliate links to Atom.com, an OUTSIDE aftermarket (not StableDomains), to find premium alternatives for the keyword. Exact-name listing on Atom is not verified (no public API). Atom handles payment/transfer.

Instant signup: returns an API key immediately (no form, no email). Guest tier (30 req/min) until claimed by email or wallet. Rate limited per IP (3/hour). Store the key; it is shown once.

Takes no parameters.

Live price quote for one domain. Returns premium (boolean) and renewal_price (USD/yr). Premium orders are refused if they exceed what we can currently fund.

Create a registration order (a price-locked quote). Returns quote{price_usd, locked_until}, payment requirements (exact amount, address, x402 accepts) and checkout_url: a prefilled /order/{id} page a human can pay from. Policy: check availability right before buying, show the quote to the human and get confirmation before paying; pass idempotency_key (retries with the same key never create a second order; if omitted, identical calls within 15 min are de-duplicated). pay_with=balance pays instantly from prepaid balance.

Register a domain and pay from prepaid balance in one call.

Get order status and next actions.

Submit payment: tx_hash (EVM hash or Solana signature) of your transfer, or x_payment (base64 x402 EIP-3009 payload, gasless).

Get your prepaid USD balance and its ledger of top-ups and spends.

Takes no parameters.

Create a top-up order (USD 1–5000); pay it like any order.

Find expiring, pending-delete and just-dropped domains ranked by a verified quality score (0-100) built from sampled Wayback snapshots (real site vs parked/for-sale), Common Crawl presence, dictionary/brandability and spam heuristics; Majestic referring subnets only count when the archive shows a real site. Parked and spam names are hidden by default; each item includes quality_reasons. Free tier returns top 25; status=available names can be bought immediately with create_order. For presets, estimated value, multi-TLD and keyword filters use drop_radar.

Domain Drop Radar: expiring, pending-delete and just-dropped domains filtered by TLD(s), length, keywords, value, quality and drop date, with presets (short-brandable, ai-names, dictionary-com, real-history, cheap-good, dropping-this-week). Returns a summary plus the top 25 with quality reasons, est. value, price, and a ready create_order body for available names or a watch body for others. For up to 500 rows call GET /api/v1/drops/full via x402 ($0.01). Page with limit + cursor (next_cursor in the response); sort with sort + order. To be alerted on future matches call radar_alert.

Save a Drop Radar search and get a signed webhook (event radar.match, header X-StableDomains-Signature = sha256 HMAC of the body with the returned secret) and/or email (double opt-in) when new names match or a pending-delete name drops. Free: 3 alerts per IP, 25 with an API key, max 20 events per alert per day. filters takes the same fields as drop_radar.

Free. Pass domain (e.g. a taken name like agent.com) to get close AVAILABLE alternatives (other extensions, get/try/hq/app variants), live-checked and ranked by price. Or pass idea to generate brandable names for a product idea. Returns only names available right now with USD price and checkout_url.

Heuristic USD value estimate for any domain (length, TLD, dictionary words, brandability, Wayback age, backlinks) with factor breakdown and availability.

RDAP (modern WHOIS) lookup for any domain: registrar, created/expires dates, status codes, nameservers, DNSSEC.

DNS + email security audit via DNS-over-HTTPS: A/AAAA/MX/NS/CAA, SPF, DKIM (common or given selectors), DMARC policy, grade A-F and concrete fixes.

Is an expired domain about to become available? Returns lifecycle (grace, redemption, pending delete, available, registered), estimated drop date and backlink data if in our drop feed.

Get notified when an expiring domain changes status or drops (becomes registrable). Pass webhook_url (active immediately, POSTs JSON events domain.status_changed / domain.available with a ready order_api body) and/or email (double opt-in). Free.

FREE 301 URL forwarding for a domain you registered with us: forward the whole domain (subdomain '@', also covers www) or a subdomain to any https URL. Points DNS at our redirect service. preserve_path keeps /path?query.

URL forwards configured on a domain you own.

FREE one-call DNS setup for a domain you own. template: vercel | netlify (params.site) | github-pages (params.user) | google-workspace | microsoft-365 | zoho-mail (params.region: com|eu|in|com.au). Replaces only the conflicting web or MX/SPF records.

Nameservers and DNS records (A/AAAA/CNAME/MX/TXT) of a domain you own.

Set DNS records and/or nameservers of a domain you own. records: [{type: A|AAAA|CNAME|MX|TXT|NS (SRV/CAA/ALIAS not supported on hosted DNS: use custom nameservers), name: '@'|sub, value, ttl?, priority? (MX)}]. mode 'replace' (default) replaces the FULL record set; mode 'merge' adds/updates the given records, deletes any in remove [{type,name,value?}], and keeps everything else (safer for adding MX/TXT next to a website).

Renew a domain you own. Returns USDC payment requirements (402), or pay_with=balance to renew instantly from prepaid balance. dry_run=true previews quote, new expiry and blockers without charging.

Signed account webhook (returns secret). Events: domain.registered, domain.registration_pending, domain.registration_completed, domain.transfer_started, domain.transfer_completed, domain.renewed, domain.expiring, dns.changed. Verify X-StableDomains-Signature = sha256 HMAC of the raw body with the secret; retries for 24h, dedupe on X-StableDomains-Delivery. null to remove.

Transfer a domain in from another registrar using its auth/EPP code; paid in USDC (adds 1 year). Unlock it at the current registrar first. Completes in ~5-7 days.

Register up to 20 available domains with ONE payment (exact total in the 402). Returns a price-locked quote, checkout_url for a human to pay, and is idempotent via idempotency_key. After payment each is registered; any failure is refunded to prepaid balance.

Your referral code and shareable link (?ref=<code>, 30-day attribution). Referrers earn 10% of our margin on paid orders by people/agents they refer; agents pass ref=<code> on create_order, create_cart or transfer_domain.

Takes no parameters.

Referral dashboard: clicks, referred users, sales, earned / unpaid / pending / paid USD, recent sales and payouts. Payouts are USDC on Base, batched weekly (min $5, capped, admin-approved) to your payout address.

Takes no parameters.

Set the Base USDC address that receives your weekly referral payouts (null to clear).

Turn auto-renew on/off for a domain you own and/or fund its renewal balance (vault). deposit_usd moves USDC from your prepaid balance (topup_balance) into the domain's vault; withdraw_usd moves it back. The daily job renews 1 year when ≤30 days from expiry if the vault covers the price, otherwise emails reminders at 30/14/7/1 days.

Auto-renew vault for a domain: renewal balance, 1-year renewal price, whether it is covered, shortfall, days to expiry and ledger. Omit domain to list all your domains' renewal balances.

Search the StableDomains.net agent directory (approved AI agents and MCP servers) by keyword or capability. Returns name, description, url, endpoint_url, mcp_url, capabilities, payment_methods and profile_url.

Get one agent directory profile by slug.

Agent profiles you submitted (any status: pending, approved, rejected) with review notes. Submit a new one with POST /api/v1/agents (auth required, moderated).

Takes no parameters.

List the domains owned by the caller, with expiry dates and status.

Takes no parameters.

Open a support ticket with a person at StableDomains (order, payment, DNS, transfer, account or abuse issues). Pass the order_id or its SD- ref if there is one. A person replies by email to the given address; the response is a ticket ref (T-XXXXXX). Do not include secrets, API keys or wallet keys in the message.