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What do you want PostStack and Lob to do together?
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Connect your AI client
Give your AI client this address.
https://mcp.apiant.aiAny client that takes a remote MCP server. Nothing to install. Create your free account, then sign in once in your browser.
Set it up in your client
Claude Code
Run this in the directory you want to work in.
claude mcp add --transport http -s project apiant-ai https://mcp.apiant.aiStart Claude Code there, approve the server, and sign in in the browser page it opens.
Claude Code guide (opens in a new tab)Claude, web and desktop
Open Customize, then Connectors, then Add custom connector, and paste the address. On Team and Enterprise an owner adds it first.
Setup guide (opens in a new tab)Cursor
Add the address to your MCP configuration as a server URL. Cursor signs you in in your browser.
Setup guide (opens in a new tab)Zed
Open Settings, then AI, then MCP Servers, then Add Server, then Add Remote Server.
Setup guide (opens in a new tab)Codex and the ChatGPT desktop app
Open Settings, then MCP servers, then Add server, and choose Streamable HTTP. From the terminal, Codex takes the address with its own add command and then signs you in.
Setup guide (opens in a new tab)Any other MCP client
Paste the address where the client asks for a remote MCP server URL, and name the server apiant-ai where it lets you. APIANT's skills reach the client over the same connection.
Setup guide (opens in a new tab)Example flows
What PostStack can start in Lob
When Contact Updated (instant) in PostStack
then Create Address in Lob
When New Contact (instant) in PostStack
then Create Bank Account in Lob
Starting points drawn from the triggers and actions in the catalog today. Describe the flow you need, at any depth, and your agent builds it and tests every scenario before it ships.
Everything your agent can do with PostStack and Lob
Triggers and actions 7 triggers · 71 actions
Trigger
Contact Deleted (instant)Fires when a contact is deleted (event: contact.deleted).
Trigger
Contact Updated (instant)Fires when a contact is updated (event: contact.updated).
Trigger
Email Bounced (instant)Fires when an email bounces (event: email.bounced).
Trigger
Email Delivered (instant)Fires when an email is delivered (event: email.delivered).
Trigger
New Contact (instant)Fires when a contact is created (event: contact.created).
Trigger
New Inbound EmailPolls for newly received inbound emails.
Trigger
New Sent Email (instant)Fires when an email is sent (event: email.sent).
Action
Add a broadcastCreate a new marketing broadcast.
Action
Add a contactCreate a new contact.
Action
Add a segmentCreate a new manual contact segment.
Action
Add a templateCreate a new email template.
Action
Add contacts to segmentAdd contacts to an existing segment.
Action
Add suppressionAdd an address to the suppression list.
Action
Cancel broadcastCancel an in-flight broadcast.
Action
Cancel emailCancel a scheduled or queued email before it sends.
Action
Delete a contactDelete a contact.
Action
Delete a templateDelete an email template.
Action
Get a contactFetch one contact by ID.
Action
Get a templateFetch one email template by ID.
Action
Get broadcastRetrieve one broadcast by its public id, including the HTML and text bodies that the list endpoint omits.
Action
Get emailFetch one sent or queued email by ID.
Action
Get email eventsGet the delivery event timeline for one email.
Action
Get inbound emailFetch one received inbound email by ID.
Action
Import contactsBulk-import a CSV list of contacts.
Action
List broadcastsList marketing broadcasts.
Action
List contactsList contacts in the account.
Action
List emailsList sent, queued, and scheduled emails.
Action
List inbound emailsList emails received via inbound parsing.
Action
List segmentsList contact segments.
Action
List suppressed addressesList addresses on the suppression list.
Action
List templatesList email templates.
Action
Send an emailSend a transactional email through PostStack.
Action
Send broadcastStart sending a broadcast to its recipients.
Action
Send emails in batchSend up to 100 emails in a single request.
Action
Update a contactUpdate an existing contact's fields.
Action
Update a templateUpdate an email template, creating a new version.
Action
Update emailReschedule a queued email's send time.
Action
Validate email addressCheck whether an email address is valid and deliverable.
Action
Autocomplete US AddressSuggests complete US street addresses from the first part of one a person has typed, so an address field can autocomplete as they type.
Action
Bulk Verify International AddressesChecks a batch of non-US addresses at once and returns each one standardized, with whether it is deliverable.
Action
Cancel CheckCancels a check in Lob so it is not mailed. Only works while the check is still in the pre-print window.
Action
Cancel LetterCancels a letter in Lob so it is not mailed. Only works while the letter is still in the pre-print window.
Action
Cancel PostcardCancels a postcard in Lob so it is not mailed. Only works while the postcard is still in the pre-print window.
Action
Create AddressSaves an address in your Lob address book so you can reuse it as a sender or recipient on later mailings.
Action
Create Bank AccountSaves a bank account in Lob so you can send checks from it. Returns the new bank account's ID and whether it has been verified yet.
Action
Create TemplateSaves a reusable HTML template in Lob that letters, postcards and checks can be built from. Returns the new template's ID and its published version.
Action
Delete AddressDeletes a saved address from Lob. Returns the deleted address's ID.
Action
Delete Bank AccountDeletes a saved bank account from Lob. Returns the deleted bank account's ID.
Action
Delete TemplateDeletes an HTML template from Lob. Returns the deleted template's ID.
Action
Get AddressReturns one saved address from Lob by its ID, including the recipient details and any name/value pairs stored on it.
Action
Get Bank AccountReturns one saved bank account from Lob by its ID, including whether it has been verified.
Action
Get CheckReturns one check from Lob by its ID, including its amount, status and delivery tracking events.
Action
Get LetterReturns one letter from Lob by its ID, including its status, addresses and delivery tracking events.
Action
Get PostcardReturns one postcard from Lob by its ID, including its status, addresses and delivery tracking events.
Action
Get TemplateReturns one HTML template from Lob by its ID, including its published version and version history.
Action
List AddressesReturns the saved addresses in your Lob address book, newest first, with cursors for paging through more.
Action
List Bank AccountsReturns the bank accounts saved in your Lob account, newest first, with cursors for paging through more.
Action
List BookletsReturns the booklets you have created in Lob, newest first, with cursors for paging through more.
Action
List CampaignsReturns the direct-mail campaigns in your Lob account, newest first, with cursors for paging through more.
Action
List ChecksReturns the checks you have sent through Lob, newest first, with cursors for paging through more.
Action
List Informed Delivery CampaignsReturns the USPS Informed Delivery campaigns in your Lob account, newest first, with cursors for paging through more.
Action
List LettersReturns the letters you have sent through Lob, newest first, with cursors for paging through more.
Action
List PostcardsReturns the postcards you have sent through Lob, newest first, with cursors for paging through more.
Action
List QR Code AnalyticsReturns the QR code scans recorded on your Lob mailpieces — who scanned, when, and how many times — plus the overall scan total.
Action
List Snap PacksReturns the snap packs you have sent through Lob, newest first, with cursors for paging through more.
Action
List TemplatesReturns the saved HTML templates in your Lob account, newest first, with cursors for paging through more.
Action
List UploadsReturns the recipient-list uploads in your Lob account, optionally narrowed to one campaign.
Action
Look Up ZIP CodeLooks up a US ZIP code and returns the cities, states and counties it covers, plus the USPS ZIP code type.
Action
Reverse Geocode LookupTakes a latitude and longitude and returns the nearest US ZIP codes with their city, state and distance from that point.
Action
Send CheckPrints and mails a physical check drawn on your Lob bank account to the recipient address you name.
Action
Send LetterPrints and mails a letter to the recipient address you name, from a PDF, an HTML body, or a saved Lob template.
Action
Send PostcardPrints and mails a postcard to the recipient address you name, using front and back artwork from a URL, HTML, or a saved Lob template.
Action
Update TemplateChanges an existing Lob HTML template - its description, or which saved version is the live one. Anything you leave blank is left as it was.
Action
Validate Recipient IdentityChecks whether a person or company name is actually associated with a US address, and returns a confidence level and match score.
Action
Verify Bank AccountConfirms a Lob bank account by submitting the two micro-deposit amounts, so the account can be used to send checks.
Action
Verify International AddressChecks a non-US address, standardizes it, and tells you whether mail sent there is likely to be delivered.
Action
Verify Single Line US AddressChecks a US address given as one single line, standardizes it, and tells you whether mail sent there is deliverable.
Action
Verify US AddressChecks a US address, standardizes it to USPS format, and tells you whether mail sent there is deliverable.
No trigger or action matches that. Ask your agent to add it: it reads the API documentation and builds what you describe.
Each app on its own
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Questions
PostStack and Lob, answered
What can start an automation from PostStack?
Any of PostStack's 7 triggers in the catalog, including Contact Updated (instant), New Contact (instant), New Inbound Email and New Sent Email (instant). Describe the moment in plain language and your agent picks the right one.
What can your agent do in Lob when something happens in PostStack?
Any of Lob's 40 actions, including Create Address, Create Bank Account, Create Template and Send Check. Your agent maps the data both ways and tests every scenario before it ships.
Can it also run from Lob to PostStack?
Lob has no triggers in the catalog today, so automations start in PostStack. If you need the other direction, ask: your agent reads Lob's API documentation and adds it.
Do I have to build a connector for PostStack or Lob?
No. Both are in the catalog with their triggers and actions. You describe the automation; your agent builds it, tests every scenario and keeps it running.
What happens when something fails?
Your agent works that out for you. It plans the failure paths along with the happy path, then tests every scenario before it ships.
Is there a free plan?
Yes. Every plan includes the agent, including free, and building from your own AI client spends no assistant credits.