API review

QuickMail API review

Cold email + LinkedIn sequencer with unlimited senders and users, Deliverability AI, a GraphQL API v2 (Growth plan and up), webhooks (Agency plan only) and an official OAuth MCP server. Best for agencies wanting org-wide webhooks across client workspaces.

Verified 25 Oct 2026 · 51 endpoints listed · Official MCP server

See pricing

QuickMail API docs

What a call costs

The actions you pay for, as QuickMail prices them.

Action	Cost	Per
Extra workspace (Agency)	$49	per workspace per month

Pricing, plan by plan

US dollars, as QuickMail's pricing page shows them on 25 Oct 2026. Monthly and annual billing are shown apart.

Free tier 14-day free trial with all features, limited to 100 imported leads and 100 emails per day; card required but no automatic subscription at trial end

Starter

$49/mo

billed monthly

1 workspace, 1,000 uploaded contacts, 5,000 emails/mo, unlimited senders/LinkedIn/users

No API

Growth

$99/mo

billed monthly

1 workspace, 25,000 uploaded contacts, 100,000 emails/mo; API

API included

Agency

$299/mo

billed monthly

2 workspaces (+$49 each extra), 100,000 uploaded contacts, 500,000 emails/mo; API + webhooks

API included

Plan details

+$49 per extra workspace

Rate limits

10 requests per 10 seconds, enforced per agency (MCP shares the same organization limit); X-RateLimit-Limit/Remaining/Reset (ISO8601) headers on every response; HTTP 429 when exceeded.

How to get an API key

QuickMail uses API key. The steps below follow QuickMail's own docs.

Create a QuickMail account. API access starts on the Growth plan.
Agency accounts: Agency Dashboard -> Settings -> General -> Create API key. Team accounts: Settings -> Integrations -> API keys. API access must be enabled on the plan.
Send it with every request: header (Authorization: <raw key>, NO 'Bearer ' prefix).

Make a first call: Agency for the current API key. Keep the key in an environment variable, never in the command.

curl -X POST "https://api.quickmail.com/v2/graphql  query agency" \
  -H "Authorization: $QUICKMAIL_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{}'

Where the docs live

What	Where
Documentation	api.quickmail.com/help
API reference	api.quickmail.com/help
Base URL	`https://api.quickmail.com`
MCP server	`https://api.quickmail.com/mcp`

Strengths and limits

Where it fits

Agencies wanting org-wide webhooks across client workspaces (Agency plan)
Teams that want unlimited users, email senders and LinkedIn accounts at a flat price
Combined email + LinkedIn steps built by API (connection, InMail, message, profile-visit steps)
Per-mailbox deliverability control via API (daily limit, Deliverability AI threshold, recovery period)

Where it falls short

Starter-plan accounts: no API, no MCP
High-throughput integrations: 10 requests per 10 seconds
Event webhooks below the $299 Agency plan
REST-only stacks: it is GraphQL only

Worth knowing

Authorization header takes the RAW key; adding 'Bearer ' breaks auth.
Rate limit is only 10 requests per 10 seconds per agency, and MCP calls draw on the same organization limit.
No API and no MCP on Starter ($49); API starts at Growth ($99).
Event webhooks are Agency-plan only ($299/mo); Growth must poll or use in-campaign webhook steps.
When plainText is true in an email mutation, openTracking and clickTracking must be false.

7 moreShow fewer

Creating a LinkedIn connection or InMail step silently creates a profile-visit step before it.
Stats: attributionType 'journey' counts a lead contacted on both channels twice; profile visits are not backfilled before tracking was enabled.
IDs are prefixed opaque strings (e.g. cmp_xxx); use exactly what the API returns.
Webhook requests carry no signing secret, HMAC or token; add your own secret query parameter to the endpoint URL to verify them.
The help article's Ruby samples post to https://api.quickmail.com/api/v2/graphql, but the API reference endpoint is https://api.quickmail.com/v2/graphql; use the reference URL.
Trial accounts are capped at 100 imported leads and 100 emails per day, so a trial cannot run a full campaign.
Salesforce is connected by BCC logging only; native 2-way CRM sync is HubSpot and Pipedrive.

Who should use it

Use QuickMail for: Agencies wanting org-wide webhooks across client workspaces (Agency plan)
Look elsewhere for: Starter-plan accounts: no API, no MCP

If QuickMail is not the answer

Other Email sending tools in this directory, each with its own review.

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

Dripify

LinkedIn outreach

From $59/moOfficial MCP

Best for solo sellers or small teams running LinkedIn + email sequences from their own accounts.

Best for agencies and teams sending hundreds of thousands of emails a month that want dedicated IPs and no per-seat or per-lead….

EmailBison API review

Before you build

Four things to settle first, each read off QuickMail's own pages.

Confirm the API is on your planAPI access starts on the Growth plan. Free tier: 14-day free trial with all features, limited to 100 imported leads and 100 emails per day.
Keep the key out of your codeAPI key. It is sent as: header (Authorization: <raw key>, NO 'Bearer ' prefix).
Design around the rate limit10 requests per 10 seconds, enforced per agency (MCP shares the same organization limit); X-RateLimit-Limit/Remaining/Reset (ISO8601) headers on every response; HTTP 429 when exceeded.
Know the catch before you scaleAuthorization header takes the RAW key; adding 'Bearer ' breaks auth.

Want us to build it for you?

Tell us what you want QuickMail 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

See case studies

Read from quickmail.com/pricing, api.quickmail.com/help and help.quickmail.com/integrations/setting-up-api-v2. Verified 25 Oct 2026.

All 51 endpointsFor developers: method, path, what it does and what it costs.

Base URL: https://api.quickmail.com

Bulk and async: Lead mutations accept 1.100 ids per call; Relay-style pagination with first/after or skip.

Webhooks: Endpoint set at org level, enabled per workspace. Separate in-sequence 'webhook steps' fire only when a lead reaches the step. Events: first open, repeat open, first click, repeat click, first reply, repeat reply, bounce, unsubscribe, lead tagging, task completed, journey completed, journey checkpoint and 1 more

Filter endpoints51 endpoints

Method	Path	What it does	Cost
POST	`/v2/graphql query agency`	Agency for the current API key	Not stated
POST	`/v2/graphql query campaign`	Find a campaign by ID (with steps, stats, leadStatus)	Not stated
POST	`/v2/graphql query campaigns`	List filterable campaigns	Not stated
POST	`/v2/graphql query customProperty`	Find a custom property	Not stated
POST	`/v2/graphql query customProperties`	List custom properties	Not stated
POST	`/v2/graphql query emailAccount`	Find an email account	Not stated
POST	`/v2/graphql query emailAccounts`	List email accounts	Not stated
POST	`/v2/graphql query lead`	Find a lead	Not stated
POST	`/v2/graphql query leads`	List filterable leads	Not stated
POST	`/v2/graphql query opportunity`	Read an opportunity and its conversation	Not stated
POST	`/v2/graphql query opportunities`	List opportunities, newest updated first (includes snoozed/archived)	Not stated
POST	`/v2/graphql query tag`	Find a tag	Not stated
POST	`/v2/graphql query tags`	List tags	Not stated
POST	`/v2/graphql query workspace`	Find a workspace	Not stated
POST	`/v2/graphql query workspaces`	List workspaces	Not stated
POST	`/v2/graphql mutation replyToOpportunity`	Reply by email or LinkedIn on the latest replyable activity	Not stated
POST	`/v2/graphql mutation addEmailVariation`	Create an email step variation	Not stated
POST	`/v2/graphql mutation addLeadsToCampaign`	Add leads to a campaign	Not stated
POST	`/v2/graphql mutation cancelLeadsFromCampaign`	Cancel leads in a campaign	Not stated
POST	`/v2/graphql mutation removeLeadsFromCampaign`	Remove leads from a campaign	Not stated
POST	`/v2/graphql mutation createCampaign`	Create a campaign	Not stated
POST	`/v2/graphql mutation duplicateCampaign`	Duplicate a campaign	Not stated
POST	`/v2/graphql mutation createEmailStep`	Create an email step	Not stated
POST	`/v2/graphql mutation createLinkedinConnectionStep`	Create a LinkedIn connection step (auto-adds a profile visit step before it)	Not stated
POST	`/v2/graphql mutation createLinkedinInmailStep`	Create a LinkedIn InMail step (auto-adds profile visit)	Not stated
POST	`/v2/graphql mutation createLinkedinMessageStep`	Create a LinkedIn message step	Not stated
POST	`/v2/graphql mutation createLinkedinProfileVisitStep`	Create a LinkedIn profile visit step	Not stated
POST	`/v2/graphql mutation createWaitStep`	Create a wait step	Not stated
POST	`/v2/graphql mutation setCampaignEmailAccounts`	Assign/unassign email accounts to a campaign	Not stated
POST	`/v2/graphql mutation renameCampaign`	Rename a campaign	Not stated
POST	`/v2/graphql mutation setCampaignEmailVerification`	Enable/disable email verification for a campaign	Not stated
POST	`/v2/graphql mutation updateCampaignAutomation`	Update campaign send-time automation	Not stated
POST	`/v2/graphql mutation updateEmailStep`	Update an email step variation	Not stated
POST	`/v2/graphql mutation updateLinkedinConnectionStep`	Update a LinkedIn connection step variation	Not stated
POST	`/v2/graphql mutation updateLinkedinInmailStep`	Update a LinkedIn InMail step variation	Not stated
POST	`/v2/graphql mutation updateLinkedinMessageStep`	Update a LinkedIn message step variation	Not stated
POST	`/v2/graphql mutation updateLinkedinProfileVisitStep`	Update a profile visit step variation	Not stated
POST	`/v2/graphql mutation updateWaitStep`	Update a wait step variation	Not stated
POST	`/v2/graphql mutation renameEmailAccount`	Change sender name	Not stated
POST	`/v2/graphql mutation setEmailAccountDailySendingLimit`	Set inbox daily email limit (null/0 removes inbox limit; workspace quota still applies)	Not stated
POST	`/v2/graphql mutation setEmailAccountDeliverabilityScoreThreshold`	Set Deliverability AI threshold	Not stated
POST	`/v2/graphql mutation setEmailAccountRecoveryPeriod`	Set Deliverability AI recovery period	Not stated
POST	`/v2/graphql mutation setEmailAccountsSmartSendingGroups`	Assign/remove smart sending colour groups	Not stated
POST	`/v2/graphql mutation setEmailAccountsCustomTrackingDomain`	Set custom tracking domain	Not stated
POST	`/v2/graphql mutation createCustomProperty`	Create a custom property	Not stated
POST	`/v2/graphql mutation createLeads`	Create leads	Not stated
POST	`/v2/graphql mutation createTag`	Create a tag	Not stated
POST	`/v2/graphql mutation deleteLeads`	Delete leads (permanent=true for hard delete)	Not stated
POST	`/v2/graphql mutation setLeadsAsDoNotContact`	Set/clear Do Not Contact	Not stated
POST	`/v2/graphql mutation setTags`	Assign/unassign tags	Not stated
POST	`/v2/graphql mutation setCustomProperty`	Set a custom property value on many leads	Not stated