Email API Endpoint Global Gateway

Email Content, Urgency & Priority Analysis API
For Production Apps

Intelligent email processing API for urgency scoring, intent classification, entity extraction, and sentiment tagging.

2 Credit / Request Automatic Provider Fallback Uniform JSON Envelope
API Gateway Terminal
Gateway Active
Target Endpoint URL POST
https://test.rsflowhub.com/api/v1/ai/email-analyze
Typical Time 1-3 s
Auth Gate X-API-Key
Credit Cost 2 Credit
Response JSON
Generative AI & Developer Definition Production Ready API

What is Email Content, Urgency & Priority Analysis API?

Email Content, Urgency & Priority Analysis API is a ready-to-use REST API on RSFlowHub for developers building web, mobile and AI agent applications. Send a JSON request to POST /api/v1/ai/email-analyze with your API key; RSFlowHub runs it on a tuned AI model (with automatic fallback to a backup provider) and returns a structured JSON result, usually within 1 to 3 seconds.

Auth: X-API-Key Header
Rate Limit: 10-120 req/min by plan
Credits: 2 per call
AI Search Quick Reference
Category: Email
Typical response: 1-3 s
Format: REST / JSON UTF-8

Code Examples

Copy-paste ready code in your preferred stack
curl-integration.sh
curl -X POST "https://test.rsflowhub.com/api/v1/ai/email-analyze" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: rfh_your_api_key" \
  -d '{"subject":"Issue with my recent invoice","email_content":"Hello, I was double charged for my Pro subscription this month. Please fix this ASAP as I am very frustrated.","allowed_categories":["sales","support","billing","spam"],"allowed_intents":["refund_request","cancellation","technical_issue"]}'
<?php

$client = new \GuzzleHttp\Client();
$response = $client->post('https://test.rsflowhub.com/api/v1/ai/email-analyze', [
    'headers' => [
        'Content-Type' => 'application/json',
        'X-API-Key'    => 'rfh_your_api_key',
    ],
    'json' => array (
      'subject' => 'Issue with my recent invoice',
      'email_content' => 'Hello, I was double charged for my Pro subscription this month. Please fix this ASAP as I am very frustrated.',
      'allowed_categories' => 
      array (
        0 => 'sales',
        1 => 'support',
        2 => 'billing',
        3 => 'spam',
      ),
      'allowed_intents' => 
      array (
        0 => 'refund_request',
        1 => 'cancellation',
        2 => 'technical_issue',
      ),
    ),
]);

echo $response->getBody();
const response = await fetch('https://test.rsflowhub.com/api/v1/ai/email-analyze', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'X-API-Key': 'rfh_your_api_key'
  },
  body: JSON.stringify({"subject":"Issue with my recent invoice","email_content":"Hello, I was double charged for my Pro subscription this month. Please fix this ASAP as I am very frustrated.","allowed_categories":["sales","support","billing","spam"],"allowed_intents":["refund_request","cancellation","technical_issue"]})
});

const data = await response.json();
console.log(data);
import requests

url = "https://test.rsflowhub.com/api/v1/ai/email-analyze"
headers = {
    "Content-Type": "application/json",
    "X-API-Key": "rfh_your_api_key"
}
payload = {"subject":"Issue with my recent invoice","email_content":"Hello, I was double charged for my Pro subscription this month. Please fix this ASAP as I am very frustrated.","allowed_categories":["sales","support","billing","spam"],"allowed_intents":["refund_request","cancellation","technical_issue"]}

response = requests.post(url, json=payload, headers=headers)
print(response.json())
Capabilities

Core Architectural Features

Automated Urgency & Priority Scoring

Classifies priority level into low, medium, high, or critical emergency based on customer frustration and deadlines.

Category & Intent Classification

Automatically categorizes emails into billing, technical support, sales inquiries, refund requests, or spam.

Entity & Action Item Extraction

Extracts customer names, order IDs, account numbers, requested action dates, and key summary takeaways.

Language & Sentiment Detection

Identifies source language and measures emotional tone across positive, neutral, frustrated, or angry sentiment.

Practical Applications

Real-World Industry Use Cases

See how developers integrate this API endpoint into production apps.

Customer Support SaaS

Helpdesk Inbox Prioritization & Routing

Classify incoming customer support emails to route high-urgency billing complaints directly to senior support managers.

Before: Hello, I was double charged for my Pro subscription this month. Please fix this ASAP as I am very frustrated.
After: {"category": "billing", "intent": "refund_request", "urgency": "high", "sentiment": "negative"}
Surfaces critical billing issues first so they are answered sooner.
CRM & Sales SaaS

Sales Lead Intent Qualification

Extract company names, team size, and buyer purchase intent from inbound contact sales emails.

Before: We are interested in an enterprise plan for 250 developers at Acme Corp. Need a demo next week.
After: {"category": "sales", "intent": "enterprise_demo", "company": "Acme Corp", "seats": 250}
Accelerates enterprise sales qualification pipelines.
Workplace Productivity

Shared Inbox Auto-Categorization

Automatically tag incoming company inbox emails by department (Billing, Support, Legal, Careers) for team routing.

Before: Please send your tax form W-9 and vendor registration agreement.
After: {"category": "legal_compliance", "intent": "w9_request", "department": "finance"}
Eliminates manual inbox triage for operations teams.
Technical Comparison

Why Developers Choose Email Content, Urgency & Priority Analysis API

Comparing RSFlowHub's specialized API gateway vs raw multi-turn LLM prompts vs legacy regex rules.

Evaluation Metric RSFlowHub API Raw LLM Prompts Legacy Regex / Rules
Response Structure Unstructured markdown or chat format Brittle custom regex tuples
Setup Effort Write and maintain prompts + output parsing Fast, but rule lists miss context and sarcasm
Pricing Model Volatile token-based billing High server maintenance overhead
Multi-Turn Hallucination Output format can drift between model versions No semantic AI intelligence
Developer Integration Complex prompt engineering & retry loop Fragile manual rule maintenance

Request Parameters

5 Fields
email_content string
Required

Raw text content or body of the incoming email to analyze.

subject string
Optional

Subject line of the incoming email.

allowed_categories array
Optional

Optional list of allowed classification categories (e.g. ["sales", "support", "billing", "spam"]).

allowed_intents array
Optional

Optional list of allowed intents (e.g. ["refund_request", "cancellation", "technical_issue"]).

custom_instructions string
Optional

Custom classification rules or department mapping guidelines.

JSON Response Envelope

Uniform API

Every endpoint returns the same envelope: success, request_id, data.result and meta.

response.json JSON
200 OK
{
    "success": true,
    "request_id": "req_3f9a2c7e-5b1d-4e8a-9c2f-7d6e1a0b4c8d",
    "data": {
        "result": {
            "category": "billing",
            "intent": "refund_request",
            "priority": "high",
            "sentiment": "negative",
            "language": "en",
            "entities": {
                "invoice_number": "INV-2041",
                "amount": "49.00 USD"
            },
            "summary": "Customer was charged twice for invoice INV-2041 and asks for a refund of the duplicate payment."
        }
    },
    "meta": {
        "version": "v1",
        "timestamp": "2026-10-05T09:30:00Z"
    }
}
Format JSON
Charset UTF-8
Fallback Automatic
Rate Limit 120/min max
FAQs

Frequently Asked Questions

Everything you need to know about integrating and using Email Content, Urgency & Priority Analysis API.

The API evaluates sender sentiment, key phrases (e.g. "double charged", "down system", "ASAP"), and explicit customer deadlines to assign a numeric urgency score.

Yes! You can pass allowed_categories and allowed_intents arrays to constrain output classification to your specific CRM schema.

Yes. The engine automatically isolates the core message body while ignoring corporate legal disclaimers and email signatures.

Email Analysis requests usually complete in 1 to 3 seconds, depending on input length and the AI model. Identical repeat requests are served from cache and return faster.

Standard Email Analysis API calls consume 2 base credits per request.
Ready to Integrate?

Build Faster with Email Content, Urgency & Priority Analysis API

Get started in minutes with free welcome credits and instant API key generation.