Skip to content
RSFlowHub
Developer docs API v1 Stable OpenAPI SDKs Playground
Review Reply API Specification & Integration Reference

POST Review Reply API

/api/v1/ai/review-reply

Generate a context-aware draft response to a customer review matching your tone and instructions.

Base Billing 1 Credit
Typical Response 1-3 s
Client Timeout 15-30 s (recommended)
Provider Fallback Automatic
JSON Contract Envelope v1

Architecture Role & AI Definition

Review Reply API provides low-latency, deterministic REST execution for production engineering workflows. It processes structured payloads with strict schema validation, returns uniform JSON envelopes, and is secured via SHA-256 API key authentication with atomic credit pre-authorization locks.

Production Reliability Guidelines

1. Strict Timeout Windows

Configure a hard client timeout of 5 to 8 seconds. If network latency spikes, cancel connection to avoid holding open sockets in worker pools.

2. Exponential Backoff with Jitter

Upon receiving 429 Rate Limit or transient 5xx, pause with exponential backoff:
wait = min(max_backoff, base * 2^attempt + jitter).

3. Atomic Pre-Auth Locks

RSFlowHub acquires an atomic lock verifying base credits before model invocation. If validation fails, zero credits are deducted.

Request Body Parameters

Field Type Required Description
review string Required The raw customer review text (Max: 20,000 characters).
rating integer Optional Optional review rating (1 to 5) to align response empathy.
business_name string Optional Optional business name to include in signature.
customer_name string Optional Optional customer name for greeting.
tone string Optional Desired response tone. Allowed: "professional", "friendly", "empathetic", "concise". Default is "professional".
language string Optional Optional draft response language.
instructions string Optional Optional custom instructions (e.g. "Ask them to contact support at help@company.com").

Example Request

This example demonstrates how to draft an empathetic reply for a negative review, providing custom directions.

JSON Request
{
  "review": "I bought this product yesterday and it broke within 2 hours. Extremely disappointed.",
  "rating": 1,
  "business_name": "TechGadgets Inc.",
  "customer_name": "Sarah Connor",
  "tone": "empathetic",
  "instructions": "Tell them support will reach out within 2 hours to ship a free replacement."
}
curl-trigger.sh cURL
curl -X POST https://rsflowhub.com/api/v1/ai/review-reply \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "review": "I bought this product yesterday and it broke within 2 hours. Extremely disappointed.",
    "rating": 1,
    "business_name": "TechGadgets Inc.",
    "customer_name": "Sarah Connor",
    "tone": "empathetic",
    "instructions": "Tell them support will reach out within 2 hours to ship a free replacement."
  }'

Example Response

The response provides the drafted content, tone, and language.

response.json JSON Response
200 OK
{
  "success": true,
  "request_id": "req_7f3a9c2d1e4b8a6f",
  "data": {
    "result": {
      "reply_text": "Hi Sarah, we are incredibly sorry to hear that your product broke so quickly. That is definitely not the standard we strive for at TechGadgets Inc. Our support team will reach out to you within the next 2 hours to coordinate shipping a free replacement. Thank you for your patience.",
      "language": "en",
      "tone": "empathetic"
    }
  },
  "meta": {
    "version": "v1",
    "timestamp": "2026-09-27T12:34:56+00:00"
  }
}

API Request Example

Use the cURL snippet below to test the endpoint.

curl-trigger.sh cURL
curl -X POST 'https://rsflowhub.com/api/v1/ai/review-reply' \
  -H 'Authorization: Bearer YOUR_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{
    "review": "I bought this product yesterday and it broke within 2 hours. Extremely disappointed.",
    "rating": 1,
    "business_name": "TechGadgets Inc.",
    "customer_name": "Sarah Connor",
    "tone": "empathetic",
    "instructions": "Tell them support will reach out within 2 hours to ship a free replacement."
}'

Want to try it without code? Test this request in the live Playground.


Common Failure Modes & Troubleshooting Matrix

HTTP Code Error Code Root Cause Recommended Remediation
401 API_KEY_MISSING / INVALID_API_KEY No key sent, or the key was mistyped or regenerated. Copy the current key from Dashboard → API Keys and send it as Authorization: Bearer (or X-API-Key).
402 INSUFFICIENT_CREDITS Your balance cannot cover the estimate for this call (base 2 credits plus input/output size). Buy a plan in Dashboard → Billing. Nothing was charged.
422 VALIDATION_ERROR A field is missing, too long or the wrong type, or the body is not valid JSON. Read error.details for the field messages and fix the request. Do not retry the same body.
429 RATE_LIMIT_EXCEEDED Your plan-wide or per-endpoint per-minute limit was reached. Wait the seconds in the Retry-After header, then retry with jitter. Rate limits
502 AI_PROVIDER_ERROR The AI model and its backup both failed. Retry with backoff and check the status page. Nothing was charged.

Technical Q&A (FAQ)

Each Review Reply API call costs 2 base credits, plus about 1 credit per 1,000 input characters and 1 credit per 500 output characters. Failed calls are not charged.

The review field accepts up to 20,000 characters per request. Larger inputs return a 422 validation error, so split long content into chunks.

Review Reply API runs on Google Gemini (gemini-2.5-flash), with automatic fallback to OpenAI (gpt-4.1-mini) if the primary provider fails or rate-limits. Models are tuned per task, so your integration does not change when we upgrade them.

Yes. Identical requests within 24 hours are answered from cache, which is faster and free or discounted in credits.

Most requests complete in 1 to 3 seconds; set a client timeout of 60 seconds so a call that switches to a backup model can finish. On HTTP 429, wait for the Retry-After delay. Retry network errors once or twice with exponential backoff and jitter.

Ready to build?

Create your free account and make your first API call in minutes.

RSFlowHub

Sign in to continue

You'll come straight back to this page.

Forgot password?

New to RSFlowHub? Create a free account