--- title: "Smartlead API: pricing, rate limits & MCP | ONEGTMLAB" description: "Smartlead API: Cold-email sending platform priced on send volume and stored contacts (not seats), with unlimited mailboxes, warmup, master inbox…" canonical: https://www.onegtmlab.dev/tool-directory/sending/smartlead --- # Smartlead API: pricing, rate limits & MCP | ONEGTMLAB [](/) [ Book a call ](/book) ![](/_astro/smartlead.DCswj1gL_ZU4vUO.webp) API review # Smartlead API review Cold-email sending platform priced on send volume and stored contacts (not seats), with unlimited mailboxes, warmup, master inbox, white-label client workspaces and a broad REST API. Best for agencies running many client workspaces off one account. Verified 25 Oct 2026 · 227 endpoints listed · Official MCP server [ See pricing ](#pricing)[ Smartlead API docs ](https://api.smartlead.ai/llms-full.txt) At a glance Category Sending Pricing model Usage-based Free tier 14-day free trial, no card (pricing page FAQ Entry price $32/mo, billed annually Base Auth API key Official MCP Yes Best for Agencies running many client workspaces off one account [smartlead.ai ↗](https://www.smartlead.ai)[Pricing page ↗](https://www.smartlead.ai/pricing) ## What a call costs The actions you pay for, as Smartlead prices them. Action Cost Per Client workspace / white-label $29 per client per month (Pro and Smart add-on; Prime includes 3+) SmartServer dedicated IP $39 per server per month (Pro and Smart add-on; Prime includes 3) Verified prospect emails allowance (Base, Pro) $59 per month add-on; included free on Smart and Prime SmartProspect quality maintenance fee (in-app SmartProspect tab) $59.00 per month on top of the plan; the trial tab showed "Leads Included 1K / Month" and "Effective Cost $0.0472 / Lead" ($59 / 1,250, so the displayed 1K and the math disagree) SmartSenders Google or Outlook mailbox, fresh (Zapmail) $4.50 per mailbox per month + $13/domain/year SmartSenders Outlook mailbox, fresh (InfraInbox) $5 per mailbox per month + $16/domain/year SmartSenders SMTP mailbox, fresh (Mailreef) $3.99 per mailbox per month + $19/domain/year SmartSenders SMTP mailbox, standard (AeroSend) $4.20 per mailbox per month + $13/domain/year Show all 12 priced actionsHide the rest Action Cost Per Pre-warmed Google or Outlook mailbox (Zapmail) $9 per mailbox per month + $18/domain/year SmartDelivery placement testing $49 / $174 / $599 per month (Growth / Pro / Export); full API only on Pro and Export Email verification credit packs from $32 packs of 6,000 to 960,000 credits, one-time or monthly (monthly saves 17%) SmartDialer voice credits $9 / $19 / $49 / $249 / $699 per month; 1 credit = $1; US numbers from $1/month; no per-seat fee (in-app SmartDialer tab) ## Pricing, plan by plan US dollars, as Smartlead's pricing page shows them on 25 Oct 2026. Monthly and annual billing are shown apart. Free tier 14-day free trial, no card (pricing page FAQ; help article 439 "Start free for 14 days"). Live trial (2026-10-25): plan\_type TRIAL\_PLAN, 2,500 sends/mo, 1,250 contacts, 0 email-verification credits, 0 SmartProspect credits (a "Claim 2,000 free credits" offer is shown); a Default API key exists and the API and MCP work on the trial, although the paid Base plan has no API. Offer: 50% off the first month on any plan (pricing page; in-app a countdown of about 3 days from signup). ### Base $39/mo billed monthly $32/mo billed annually 2,000 stored contacts, 6,000 sends/mo, 2,000 verified prospect emails/mo as a $59/mo add-on; billed annually $388/yr in-app No APIPlan details upgrade plan ### Pro $94/mo billed monthly $78/mo billed annually 30,000 contacts, 90,000 sends/mo, 30,000 verified prospect emails/mo as a $59/mo add-on; billed annually $936/yr in-app API includedPlan details upgrade plan ### Unlimited Smart $174/mo billed monthly $144/mo billed annually in-app name "Smart"; unlimited contacts, 150,000 sends/mo, 50,000 verified prospect emails included; billed annually $1,733/yr in-app API includedPlan details upgrade to Prime (in-app shows Smart as "150K+" sends) ### Unlimited Prime $379/mo billed monthly $315/mo billed annually in-app name "Prime"; unlimited contacts, 500,000 sends/mo, 170,000 verified prospect emails, 3 SmartServers + OAuth, 3+ client workspaces, dedicated manager, private Slack; billed annually $3,775/yr in-app API includedPlan details in-app shows "500K+" sends; the pricing-page slider runs past 500K sends (up to 5.1M+) without showing a price for those steps, so higher-volume pricing is not published (the page script holds unrendered figures, not used here) ## Rate limits Docs: per account, all endpoints and all admin keys combined: Standard 60 req/min, 1,000/hour, burst 10/s; Pro 120/min, 3,000/hour, burst 20/s; Enterprise custom. ### Standard (docs) Per Minute 60 Per Hour 1,000 Burst Per Second 10 ### Pro (docs) Per Minute 120 Per Hour 3,000 Burst Per Second 20 ### Enterprise (docs) Per Minute custom ### Free trial (observed header, window about 60 s) Per Window 200 More on limitsLess The docs do not say which Smartlead plan (Base/Pro/Smart/Prime) maps to "Standard" or "Pro", and the docs FAQ says to contact support or check the dashboard for exact values. Live (our trial key, 2026-10-25): every v1 response carried x-ratelimit-limit: 200 with x-ratelimit-reset as a Unix timestamp about 30-60 s ahead, which matches neither documented tier; prospect-api.smartlead.ai returned no rate-limit headers. Three heavy endpoints (leads-statistics, all-leads-activities, domain-wise-health-metrics) carry their own 10 req/60 s limit on top, whose 429 is plain text with no Retry-After or X-RateLimit headers. ## How to get an API key Smartlead uses API key. The steps below follow Smartlead's own docs. 1. Create a Smartlead account. API access starts on the Pro plan. 2. Settings & Profile > API Key Management (/app/settings/api-key-management). A "Default" admin key is created automatically at first login, including on the free trial (live app 2026-10-25). Up to 25 named admin keys per account, all sharing one rate-limit pool; the primary key cannot be revoked, only reset. Client-level keys per white-label client; revoked client keys stay visible (masked) for 30 days. 3. Send it with every request: query (?api\_key=...). 4. Make a first call: Get Campaign List, Retrieve list of all campaigns for building selectors and filtering. Keep the key in an environment variable, never in the command. ``` curl -X GET "https://server.smartlead.ai/api/v1/analytics/campaign/list?api_key=$SMARTLEAD_API_KEY" ``` ## Where the docs live What Where Documentation [api.smartlead.ai/introduction](https://api.smartlead.ai/introduction) API reference [api.smartlead.ai/llms-full.txt](https://api.smartlead.ai/llms-full.txt) llms.txt [api.smartlead.ai/llms.txt](https://api.smartlead.ai/llms.txt) Base URL `https://server.smartlead.ai` MCP server `https://mcp.smartlead.ai/sse?user_api_key=YOUR_API_KEY` ## Strengths and limits ### Where it fits - Agencies running many client workspaces off one account (client-level API keys, white-label) - High-volume cold email with mailbox rotation across unlimited connected inboxes - Programmatic campaign build: create campaign, sequences, schedule, attach mailboxes, import leads (400/request) - Webhook-driven reply capture into a CRM or Supabase ### Where it falls short - Base-plan accounts: API and webhooks are not included on Base ($39) - Relying on its AI reply categorisation as the only triage layer (our audit measured near-zero recall outside positives) - LinkedIn-first outreach (pair with HeyReach/Aimfox instead) ### Worth knowing - API and webhooks are NOT on the Base plan; Pro ($94/mo) is the first tier with API. - Auth is ?api\_key= in the query string, so keys land in proxy/server logs; MCP also puts the key in the URL. - The Mintlify openapi.json at api.smartlead.ai/api-reference/openapi.json is the placeholder 'Plant Store' sample, not the real spec; use llms-full.txt. - Three analytics endpoints have their own 10 req/60 s limit and return a plain-text 429 with no Retry-After header; back off a fixed 60 s. - All admin keys share one rate-limit pool, so one heavy integration starves the others. 14 moreShow fewer - Webhook retry policy is documented two different ways (5 retries then disable vs 3 retries then mark failed); monitor webhook health rather than trusting either. - A user-level webhook overrides campaign/client-level ones; only it receives events. - Lead (contact) credits do not reset monthly; delete finished campaigns to release them; email-send credits are a separate monthly counter. - Our experience: /inbox/get-messages and /lead-categories return 404; the working category path is GET /leads/fetch-categories and replies come from GET /campaigns/{id}/leads/{lead\_id}/message-history. - Our experience: message-history type=REPLY is used for BOTH inbound replies and our own manual outbound replies; read direction from the from address. - Our experience: Smartlead variables are DOUBLE braces {{field}} (HeyReach is single); Smartlead auto-appends the mailbox signature, so strip inline sign-offs. - Base URL is `https://server.smartlead.ai` with every core path under /api/v1 (docs FAQ: "V1 endpoints prefixed at /api/v1/"). Four other hosts carry their own /api/v1 paths, written as absolute URLs in this record: prospect-api.smartlead.ai (SmartProspect), smartdelivery.smartlead.ai, smart-senders.smartlead.ai and smartservers.smartlead.ai. - Campaign status: write START / PAUSED / STOPPED / ARCHIVED with POST /api/v1/campaigns/{id}/status. The same docs show "ACTIVE" in the Python example and in llms.txt, and the create-campaign "Next Steps" box shows PATCH for status, settings and schedule; the endpoint reference pages, the MCP server instructions and our own script use POST + START. - START only checks that a schedule exists: it succeeds on a campaign with no sequences, mailboxes or leads, and then nothing sends. - The API caps lead import at 400 per request, but the MCP add\_leads\_to\_campaign tool says "up to 1000 leads per call". - POST /api/v1/campaigns/{id}/forward-email has no documented request body; the vendor page itself says the schema "needs verification from controller implementation". - The paid Base plan has no API or webhooks, yet the 14-day trial does: a Default admin key is auto-created and v1, prospect-api and MCP calls returned 200 on the trial. Test on the trial, but buy Pro or above if you need the API. - GET /api/v1/leads/get-domain-block-list took 15.4 s on an empty trial account; set generous client timeouts. - Integrations: the marketing site lists Zapier, Slack, Salesforce, Pipedrive, Attio, Expandi and others as native, but the in-app Native Connections tab showed only HubSpot (Beta), Clay, Listkit, LeadMagic and OutboundSync; Salesforce comes via OutboundSync, HeyReach and Close via SmartAgent AI Connections, and Expandi and Attio were "Coming soon" there. ### Our take We have run Smartlead email campaigns for several clients, launched in plain-text mode with open and click tracking off, stop-on-reply on, bounce auto-protection at about 5% and at most 15 sends per mailbox a day. On one client's campaigns Smartlead's automatic reply categories caught every positive reply and missed every opt-out and out-of-office reply, and the opt-outs were left off the suppression list, so we classify replies ourselves from each lead's message history, reading direction from the sender address because the API marks both their replies and ours as REPLY. In the API, re-posting a running campaign's sequence without the existing step ids resends step 1, the send\_as\_plain\_text flag is silently ignored, and uploads silently drop leads already in another campaign, so we reconcile lead counts after every upload. ## Who should use it Use Smartlead for Agencies running many client workspaces off one account (client-level API keys, white-label) Look elsewhere for Base-plan accounts: API and webhooks are not included on Base ($39) ## If Smartlead is not the answer Other Email sending tools in this directory, each with its own review. [ ![](/_astro/aimfox.Cl8sLyp7.svg) Aimfox LinkedIn outreach From $40.83/moOfficial MCP Best for multi-account LinkedIn outreach where you want to rent extra sender profiles natively. Aimfox API review →](/tool-directory/linkedin-outreach/aimfox)[ ![](/_astro/expandi.D4GeRy4A_1fRi81.webp) Expandi LinkedIn outreach From $79/moOfficial MCP Best for single LinkedIn accounts or small sales teams that want safety features. Expandi API review →](/tool-directory/linkedin-outreach/expandi)[ ![](/_astro/heyreach.CErc6v03_1Rz4XA.webp) HeyReach LinkedIn outreach From $48/moOfficial MCP Best for multi-sender LinkedIn campaigns with automatic sender rotation and hard per-account limits. HeyReach API review →](/tool-directory/linkedin-outreach/heyreach) ### Compare Smartlead with - [![](/_astro/instantly.w1WoNFJP.svg)Instantly side by side](/tool-directory/compare/instantly-vs-smartlead) ## Before you build Four things to settle first, each read off Smartlead's own pages. - **Confirm the API is on your plan**API access starts on the Pro plan. Free tier: 14-day free trial, no card (pricing page FAQ. - **Keep the key out of your code**API key. It is sent as: query (?api\_key=...). - **Design around the rate limit**Docs: per account, all endpoints and all admin keys combined: Standard 60 req/min, 1,000/hour, burst 10/s; Pro 120/min, 3,000/hour, burst 20/s; Enterprise custom. - **Know the catch before you scale**API and webhooks are NOT on the Base plan; Pro ($94/mo) is the first tier with API. ## Want us to build it for you? Tell us what you want Smartlead to do in your stack. We will show you how we would wire it into your data, outbound or CRM, and what we would check first. [ Book a call ](/book)[ See case studies ](/case-studies) Read from [smartlead.ai/pricing](https://www.smartlead.ai/pricing), [api.smartlead.ai/llms-full.txt](https://api.smartlead.ai/llms-full.txt) and [api.smartlead.ai/guides/rate-limits](https://api.smartlead.ai/guides/rate-limits). Verified 25 Oct 2026. All 227 endpointsFor developers: method, path, what it does and what it costs. **Base URL:** `https://server.smartlead.ai` **Bulk and async:** Lead import up to 400 leads per request; CSV export endpoints for campaign data. **Webhooks:** Events: EMAIL\_SENT, FIRST\_EMAIL\_SENT, EMAIL\_OPEN, EMAIL\_LINK\_CLICK, EMAIL\_REPLY, EMAIL\_BOUNCE, LEAD\_UNSUBSCRIBED, LEAD\_CATEGORY\_UPDATED, CAMPAIGN\_STATUS\_CHANGED, UNTRACKED\_REPLIES, MANUAL\_STEP\_REACHED, EMAIL\_ACCOUNT\_DISCONNECTED and 1 more. Retries: Docs disagree: core/webhooks says 5 retries (1m,5m,15m,1h,6h) then the webhook is DISABLED; guides/webhook-integration says 3 retries (1m,5m,30m) then the event is marked failed. Retrigger endpoint exists. Filter endpoints 227 endpoints Method Path What it does Cost GET `/api/v1/analytics/campaign/list` Get Campaign List, Retrieve list of all campaigns for building selectors and filtering Not stated GET `/api/v1/analytics/campaign/overall-stats` Campaign Performance, Get performance metrics for each campaign with engagement rates and lead counts Not stated GET `/api/v1/analytics/campaign/response-stats` Campaign Response Stats, Get detailed response analysis per campaign with sentiment breakdown Not stated GET `/api/v1/analytics/campaign/status-stats` Campaign Status Stats, Get count of campaigns in each status for operational overview Not stated GET `/api/v1/analytics/client/list` Get Client List, Get list of all clients for agency account filtering and selection Not stated GET `/api/v1/analytics/client/overall-stats` Client Overall Stats, Get performance metrics by client for agency reporting and analysis Not stated GET `/api/v1/analytics/day-wise-positive-reply-stats` Day-wise Positive Reply Stats, Get daily positive reply metrics filtered to interested/positive categories only Not stated GET `/api/v1/analytics/day-wise-positive-reply-stats-by-sent-time` Positive Reply Stats by Sent Time, Get positive replies by sent time to optimize sending schedule Not stated GET `/api/v1/analytics/day-wise-overall-stats-by-sent-time` Day-wise Stats by Sent Time, Get daily breakdown organized by email sent time for schedule analysis Not stated GET `/api/v1/analytics/day-wise-overall-stats` Get Day-wise Overall Stats, Get day-by-day email engagement breakdown with daily metrics Not stated GET `/api/v1/analytics/mailbox/domain-wise-health-metrics` Domain-wise Health Metrics, Get performance metrics aggregated by email domain for domain analysis Not stated GET `/api/v1/analytics/mailbox/name-wise-health-metrics` Email-ID-wise Health Metrics, Get detailed health metrics by individual email account address Not stated GET `/api/v1/analytics/campaign/follow-up-reply-rate` Follow-up Reply Rate, Analyze reply rates specifically for follow-up sequences (2, 3, 4+) Not stated GET `/api/v1/analytics/lead/category-wise-response` Lead Category-wise Response, Get lead response breakdown by category type with sentiment distribution Not stated GET `/api/v1/analytics/lead/overall-stats` Lead Statistics, Get comprehensive lead engagement statistics by status and category Not stated GET `/api/v1/analytics/campaign/lead-to-reply-time` Lead to Reply Time, Measure average time from first email sent to first reply received Not stated GET `/api/v1/analytics/campaign/leads-take-for-first-reply` Leads Take for First Reply, Calculate average leads contacted before receiving first reply Not stated GET `/api/v1/analytics/mailbox/overall-stats` Mailbox Overall Stats, Get overall health and performance statistics for all mailboxes Not stated GET `/api/v1/analytics/client/month-wise-count` Get Month-wise Client Count, Get monthly breakdown of active clients showing growth trends Not stated GET `/api/v1/analytics/overall-stats-v2` Get Overall Analytics, Get account-wide overall statistics for date range with sent, opened, replied metrics Not stated GET `/api/v1/analytics/mailbox/provider-wise-overall-performance` Provider-wise Performance, Compare performance across email service providers (Gmail, Outlook, SMTP) Not stated GET `/api/v1/analytics/team-board/overall-stats` Team Board Stats, Get performance metrics by team member for collaboration features Not stated GET `/api/v1/campaigns/{campaign_id}/analytics-by-date` Fetch Campaign Statistics by Date Range, Fetch campaign statistics using the campaign's ID filtered by date range Not stated GET `/api/v1/campaigns/{campaign_id}/statistics` Fetch Campaign Statistics by Campaign ID, Fetch campaign statistics using the campaign's ID Not stated GET `/api/v1/campaigns/{campaign_id}/leads-statistics` Fetch Campaign Lead Statistics, Fetch campaign lead statistics using the campaign's ID Not stated GET `/api/v1/campaigns/{campaign_id}/mailbox-statistics` Fetch Campaign Mailbox Statistics, Fetch mailbox statistics specific to a campaign Not stated GET `/api/v1/campaigns/{campaign_id}/sequence-analytics` Fetch Campaign Sequence Analytics, Per-sequence and per-variant performance for a campaign, with rates. Not stated GET `/api/v1/campaigns/{campaign_id}/analytics` Fetch Campaign Top Level Analytics, Fetch a campaign's top level analytics Not stated GET `/api/v1/campaigns/{campaign_id}/top-level-analytics-by-date` Fetch Campaign Top Level Analytics by Date Range, Fetch campaign top-level analytics filtered by date range Not stated POST `/api/v1/campaigns/{campaign_id}/email-accounts` Add Email Accounts to Campaign, Associates one or more email accounts with a campaign for automatic sender rotation. Not stated POST `/api/v1/campaigns/{campaign_id}/email-accounts/by-tag` Add Email Accounts to Campaign by Tag, Attach every mailbox carrying a given tag to a campaign in a single call. Not stated POST `/api/v1/campaigns/{campaign_id}/leads` Add Leads to Campaign, Add new leads to a campaign with custom fields and validation settings consumes lead (contact storage) credits; max 400 leads per request POST `/api/v1/campaigns/tags` Add Tags to Campaigns, Attach one or more tags to one or more campaigns in a single request Not stated GET `/api/v1/campaigns/all-leads-activities` Get All Leads Activities, Retrieve lead activities across all campaigns for the authenticated user Not stated POST `/api/v1/campaigns/assign-client` Assign Client to Campaign, Assign a campaign to a client (or remove its client), optionally applying the client's DNC list Not stated POST `/api/v1/campaigns/create` Create Campaign, Creates a new email campaign with default settings in DRAFTED status. Not stated POST `/api/v1/campaigns/{campaign_id}/prompt-template` Create Campaign AI Prompt Template, Add an AI reply-categorisation prompt and lead categories to a campaign Not stated POST `/api/v1/campaigns/create-subsequence` Create Subsequence Campaign, Create a child campaign (subsequence) with conditional trigger logic Not stated DELETE `/api/v1/campaigns/{campaign_id}` Delete Campaign, Permanently and irreversibly deletes a campaign and ALL associated data: sequences, lead-campaign mappings, email statis Not stated DELETE `/api/v1/campaigns/{campaign_id}/leads/{lead_id}` Delete Lead from Campaign, Remove a lead from a campaign Not stated [](/) © 2026 ONEGTMLAB Private Limited. All rights reserved. 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