MercurySend
Developer API

An SMS API with 10DLC already handled.

REST, webhooks, and SDKs — send your first compliant text today. We register your 10DLC, meter every message exactly once, and give you the same sender across the inbox, email, and your code.

No credit card · Set up in minutes · Cancel anytime

  • 10DLC handled for you
  • Credits never expire
  • No annual contract
  • US & AU compliance
POST /v1/messages
curl https://api.mercurysend.com/v1/messages \
  -H "Authorization: Bearer msk_live_…" \
  -H "Idempotency-Key: job-4821-dispatch" \
  -d to="(310) 555-1234" \
  -d body="Your driver is on the way. #TRACKREQUEST#"

# 201 — queued, gated, metered once
{
  "id": "msg_9f3a…",
  "status": "queued",
  "segments": 1,
  "cost": { "credits": 1, "carrier_fee": "0.0079" }
}
Inbox, API, or email

One compliant sender, however your team wants to text.

Ship the API where you need automation, hand the shared inbox to the team, and let non-technical staff text from email — all on the same number, the same compliance, one bill.

A shared inbox

A no-code shared inbox for the team — assign, note, and reply. Same number, same compliance.

Your email

Send a text by emailing a number; replies come back to the inbox. Zero-code, for non-developers.

The API

REST + webhooks + SDKs. Programmatic sends and alerts, with 10DLC handled by the platform.

Built for production

The boring guarantees you actually need.

Metered exactly once

Pass an Idempotency-Key and a retried request never double-charges or double-sends. Billing reconciles against the carrier receipt, never an estimate.

Delivery webhooks

Subscribe to status events — queued, sent, delivered, failed — and get the carrier receipt back, so your system always knows what actually happened.

Compliance in the send path

The same gate runs on API sends: consent, opt-outs, quiet hours, and content checks. Non-compliant sends are refused with a structured error, not silently dropped.

Credits never expire

Buy credit, use it whenever. No monthly reset, no annual contract, no expiry on what you've already paid for.

Send your first text today.

Free to start, no credit card. Grab a key, and we'll have 10DLC handled behind it.

No credit card · Set up in minutes · Cancel anytime

Pricing

What it costs.

Start free, then pick a plan when you're ready. Every plan includes inbound messages, AI actions, and credits that never expire — no contract.

Save 20%
Free
$0free
Free forever to try
10 texts to start

Kick the tires — no card needed.

  • Two-way shared inbox
  • AI drafting & replies
  • Credits never expire
  • No credit card
Start free
Starter
US$9.95/week
or save 20% billed annually
500 messages / week
then per extra text

Getting off email and spreadsheets.

  • 10DLC handled for you
  • Two-way shared inbox
  • AI drafting & replies
  • Automations & broadcasts
Start free
Most picked
Growth
US$24.95/week
or save 20% billed annually
1,500 messages / week
then per extra text

A team sharing one inbox.

  • 10DLC handled for you
  • Two-way shared inbox
  • AI drafting & replies
  • Automations & broadcasts
Start free
Pro
US$49.95/week
or save 20% billed annually
3,000 messages / week
then 5.5¢ per extra text

High volume, lowest per-message rate.

  • 10DLC handled for you
  • Priority support
  • Higher sending limits
  • Lowest per-message rate
Start free