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instantly-sdk-patterns Apply production-ready Instantly.ai API client patterns for TypeScript and Python.
Use when building reusable API wrappers, implementing retry logic,
or establishing coding standards for Instantly integrations.
Trigger with phrases like "instantly SDK patterns", "instantly best practices",
"instantly client wrapper", "instantly code patterns", "idiomatic instantly".
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langchain-deploy-integration Deploy a LangChain 1.0 / LangGraph 1.0 app to Cloud Run, Vercel, or LangServe correctly — with timeouts sized for chain length, cold-start mitigation, SSE anti-buffering headers, and Secret Manager over .env. Use when prepping a first production deploy, debugging a stream that hangs behind a proxy, or diagnosing p99 latency spikes. Trigger with "langchain deploy", "langchain cloud run", "langchain vercel python", "langchain langserve", or "langchain docker".
name instantly-sdk-patterns description Apply production-ready Instantly.ai API client patterns for TypeScript and Python.
Use when building reusable API wrappers, implementing retry logic,
or establishing coding standards for Instantly integrations.
Trigger with phrases like "instantly SDK patterns", "instantly best practices",
"instantly client wrapper", "instantly code patterns", "idiomatic instantly".
allowed-tools Read, Write, Edit, Bash(npm:*), Grep version 1.12.0 license MIT author Jeremy Longshore <jeremy@intentsolutions.io> tags ["saas","instantly","patterns","typescript","python"] compatibility Designed for Claude Code
Instantly SDK Patterns
Overview
Production-ready patterns for Instantly API v2 integrations. Instantly has no official SDK — all integrations use direct REST calls to https://api.instantly.ai/api/v2/. These patterns provide type safety, retry logic, pagination, and multi-tenant support.
Prerequisites
Completed instantly-install-auth setup
Familiarity with async/await and TypeScript generics
Understanding of REST API pagination patterns
Instructions
Step 1: Type-Safe Client with Error Classification
import "dotenv/config" ;
export class InstantlyClient {
private baseUrl : string ;
private apiKey : string ;
constructor (options ?: { apiKey?: string ; baseUrl?: string }this .apiKey = options?.apiKey || process.env .INSTANTLY_API_KEY || "" ;
this .baseUrl = options?.baseUrl || "https://api.instantly.ai/api/v2" ;
if (!this .apiKey ) throw new Error ("INSTANTLY_API_KEY is required" );
}
async request<T>(path : string , options : RequestInit = {}): Promise
const
`${this .baseUrl} ${path} `
const
await
fetch
headers
"Content-Type"
"application/json"
Authorization
`Bearer ${this .apiKey} `
headers
if
ok
const
await
text
throw
new
InstantlyApiError
status
return
json
as
Promise
async
getCampaigns
params ?: { limit?: number ; status?: number ; search?: string }
const
new
URLSearchParams
if
limit
set
"limit"
String
limit
if
status
undefined
set
"status"
String
status
if
search
set
"search"
search
return
this
request
Campaign
`/campaigns?${qs} `
async
getCampaign
id : string
return
this
request
Campaign
`/campaigns/${id} `
async
createCampaign
data : CreateCampaignInput
return
this
request
Campaign
"/campaigns"
method
"POST"
body
JSON
stringify
async
activateCampaign
id : string
return
this
request
void
`/campaigns/${id} /activate`
method
"POST"
async
pauseCampaign
id : string
return
this
request
void
`/campaigns/${id} /pause`
method
"POST"
async
getAccounts
params ?: { limit?: number ; status?: number }
const
new
URLSearchParams
if
limit
set
"limit"
String
limit
if
status
undefined
set
"status"
String
status
return
this
request
Account
`/accounts?${qs} `
async
addLead
data : CreateLeadInput
return
this
request
Lead
"/leads"
method
"POST"
body
JSON
stringify
async
listLeads
filter : ListLeadsInput
return
this
request
Lead
"/leads/list"
method
"POST"
body
JSON
stringify
async
getCampaignAnalytics
ids : string []
const
map
(id ) =>
`ids=${id} `
join
"&"
return
this
request
CampaignAnalytics
`/campaigns/analytics?${qs} `
export
class
InstantlyApiError
extends
Error
public
retryable
boolean
constructor
public status : number , public path : string , public body : string
super
`Instantly ${status} on ${path} : ${body} `
this
name
"InstantlyApiError"
this
retryable
429
500
Step 2: TypeScript Interfaces
export interface Campaign {
id : string ;
name : string ;
status : number ;
campaign_schedule : CampaignSchedule ;
sequences : Sequence [];
daily_limit : number | null ;
stop_on_reply : boolean ;
email_gap : number ;
timestamp_created : string ;
}
export interface CampaignSchedule {
start_date : string | null ;
end_date : string | null ;
schedules : Array <{
name : string ;
timing : { from : string ; to : string };
days : Record <string , boolean >;
timezone : string ;
}>;
}
export interface Sequence {
steps : SequenceStep [];
}
export interface SequenceStep {
type : "email" ;
delay : number ;
delay_unit ?: "minutes" | "hours" | "days" ;
variants : Array <{ subject : string ; body : string ; v_disabled ?: boolean }>;
}
export interface Account {
email : string ;
first_name : string ;
last_name : string ;
status : number ;
warmup_status : string ;
daily_limit : number | null ;
provider_code : number ;
warmup : { limit : number ; increment : string ; advanced : Record <string , unknown > };
}
export interface Lead {
id : string ;
email : string | null ;
first_name : string | null ;
last_name : string | null ;
company_name : string | null ;
status : number ;
campaign : string | null ;
email_open_count : number ;
email_reply_count : number ;
}
export interface CreateCampaignInput {
name : string ;
campaign_schedule : CampaignSchedule ;
sequences : Sequence [];
daily_limit ?: number ;
stop_on_reply ?: boolean ;
email_gap ?: number ;
open_tracking ?: boolean ;
link_tracking ?: boolean ;
}
export interface CreateLeadInput {
campaign ?: string ;
list_id ?: string ;
email : string ;
first_name ?: string ;
last_name ?: string ;
company_name ?: string ;
custom_variables ?: Record <string , string >;
skip_if_in_workspace ?: boolean ;
verify_leads_on_import ?: boolean ;
}
export interface ListLeadsInput {
campaign ?: string ;
list_id ?: string ;
limit ?: number ;
starting_after ?: string ;
}
export interface CampaignAnalytics {
campaign_id : string ;
total_leads : number ;
emails_sent : number ;
emails_opened : number ;
emails_replied : number ;
emails_bounced : number ;
}
Step 3: Retry with Exponential Backoff
export async function withRetry<T>(
operation : () => Promise <T>,
maxRetries = 3 ,
baseDelayMs = 1000
): Promise <T> {
for (let attempt = 0 ; attempt <= maxRetries; attempt++) {
try {
return await operation ();
} catch (err) {
if (attempt === maxRetries) throw err;
if (err instanceof InstantlyApiError && !err.retryable ) throw err;
const delay = baseDelayMs * Math .pow (2 , attempt);
const jitter = Math .random () * delay * 0.1 ;
console .warn (`Retry ${attempt + 1 } /${maxRetries} in ${delay} ms...` );
await new Promise ((r ) => setTimeout (r, delay + jitter));
}
}
throw new Error ("Unreachable" );
}
const campaigns = await withRetry (() => client.getCampaigns ({ limit : 50 }));
Step 4: Cursor-Based Pagination
export async function * paginate<T extends { id : string }>(
client : InstantlyClient ,
path : string ,
pageSize = 100
): AsyncGenerator <T[], void , void > {
let startingAfter : string | undefined ;
while (true ) {
const qs = new URLSearchParams ({ limit : String (pageSize) });
if (startingAfter) qs.set ("starting_after" , startingAfter);
const page = await client.request <T[]>(`${path} ?${qs} ` );
if (page.length === 0 ) break ;
yield page;
startingAfter = page[page.length - 1 ].id ;
if (page.length < pageSize) break ;
}
}
for await (const batch of paginate<Campaign >(client, "/campaigns" )) {
for (const campaign of batch) {
console .log (campaign.name , campaign.status );
}
}
Step 5: Multi-Tenant Factory (Agency Pattern)
const clients = new Map <string , InstantlyClient >();
export function getClientForWorkspace (workspaceId : string , apiKey : string InstantlyClient {
if (!clients.has (workspaceId)) {
clients.set (workspaceId, new InstantlyClient ({ apiKey }));
}
return clients.get (workspaceId)!;
}
const clientA = getClientForWorkspace ("acme" , process.env .ACME_API_KEY !);
const clientB = getClientForWorkspace ("globex" , process.env .GLOBEX_API_KEY !);
Python Client
import os, time, httpx
from dataclasses import dataclass
from typing import Optional
@dataclass
class InstantlyClient :
api_key: str = ""
base_url: str = "https://api.instantly.ai/api/v2"
def __post_init__ (self ):
self .api_key = self .api_key or os.getenv("INSTANTLY_API_KEY" , "" )
self ._client = httpx.Client(
base_url=self .base_url,
headers={"Authorization" : f"Bearer {self.api_key} " , "Content-Type" : "application/json" },
timeout=30.0 ,
)
def get (self, path: str , params: Optional [dict ] = None ):
r = self ._client.get(path, params=params)
r.raise_for_status()
return r.json()
def post (self, path: str , json_data: Optional [dict ] = None ):
r = self ._client.post(path, json=json_data)
r.raise_for_status()
return r.json()
def patch (self, path: str , json_data: dict ):
r = self ._client.patch(path, json=json_data)
r.raise_for_status()
return r.json()
def delete (self, path: str ):
r = self ._client.delete(path)
r.raise_for_status()
def list_campaigns (self, limit: int = 50 ):
return self .get("/campaigns" , params={"limit" : limit})
def get_campaign_analytics (self, campaign_id: str ):
return self .get("/campaigns/analytics" , params={"id" : campaign_id})
Error Handling Pattern Use Case Benefit Error classification All API calls retryable flag prevents retrying 400/403 errorsExponential backoff 429 / 5xx errors Respects rate limits automatically Cursor pagination Large datasets Memory-efficient iteration Multi-tenant factory Agency/multi-workspace Isolated clients per workspace
Resources
Next Steps Apply patterns in instantly-core-workflow-a for real-world campaign automation.
