POST Sentiment Analysis API
/api/v1/ai/sentiment-analysis
Analyze the emotional tone of text to identify positive, negative, neutral, or mixed sentiments.
Architecture Role & AI Definition
Sentiment Analysis 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
Configure a hard client timeout of 5 to 8 seconds. If network latency spikes, cancel connection to avoid holding open sockets in worker pools.
Upon receiving 429 Rate Limit or transient 5xx, pause with exponential backoff:
wait = min(max_backoff, base * 2^attempt + jitter).
RSFlowHub acquires an atomic lock verifying base credits before model invocation. If validation fails, zero credits are deducted.
This API is part of the utility tier. Every plan includes a shared monthly quota of free utility requests (1,000/month on the Free plan). Credits are only used after the quota is reached.
Request Body Parameters
| Field | Type | Required | Description |
|---|---|---|---|
text |
string | Required | The text content you want to analyze (Max: 5,000 characters). |
aspects |
array of strings | Optional | Optional list of specific topics to analyze sentiment for (e.g., ["UI", "billing", "speed"]). Max 10 items. |
Example Request (Basic)
{
"text": "The new dashboard is incredibly fast and looks amazing!"
}curl -X POST https://rsflowhub.com/api/v1/ai/sentiment-analysis \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"text": "The new dashboard is incredibly fast and looks amazing!"
}'Example Response (Basic)
The API guarantees the sentiment string will be one of: positive, negative, neutral, or mixed.
{
"success": true,
"request_id": "req_7f3a9c2d1e4b8a6f",
"data": {
"result": {
"sentiment": "positive",
"confidence": 0.98
}
},
"meta": {
"version": "v1",
"timestamp": "2026-09-27T12:34:56+00:00"
}
}Advanced Example (Aspect-Based Sentiment)
Provide an aspects array to get targeted sentiment scores for specific subjects mentioned in the text.
{
"text": "The dashboard is really fast, but the billing page is confusing and support took too long.",
"aspects": ["dashboard", "billing", "support"]
}{
"success": true,
"request_id": "req_7f3a9c2d1e4b8a6f",
"data": {
"result": {
"sentiment": "mixed",
"confidence": 0.85,
"aspect_sentiments": [
{
"aspect": "dashboard",
"sentiment": "positive",
"confidence": 0.95
},
{
"aspect": "billing",
"sentiment": "negative",
"confidence": 0.92
},
{
"aspect": "support",
"sentiment": "negative",
"confidence": 0.88
}
]
}
},
"meta": {
"version": "v1",
"timestamp": "2026-09-27T12:34:56+00:00"
}
}API Request Example
Use the cURL snippet below to test the endpoint.
curl -X POST 'https://rsflowhub.com/api/v1/ai/sentiment-analysis' \
-H 'Authorization: Bearer YOUR_API_KEY' \
-H 'Content-Type: application/json' \
-d '{
"text": "The dashboard is really fast, but the billing page is confusing.",
"aspects": [
"dashboard",
"billing"
]
}'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 1 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. |