Use when you need sentiment analysis of text such as reviews, comments or headli
Use when you need sentiment analysis of text such as reviews, comments or headlines in English. Do not use for neutral or emotion labels, non-English text or aspect-level sentiment. Returns JSON with the sentiment of English text (positive or negative with a confidence score) from DistilBERT SST-2 on Workers AI, for one text or a batch of up to 20 for 0.004 USDC per call. Typical response time 1500 ms (p95). Category: Inference.
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://x402-gateway.blackwoodstate8.workers.dev/v1/sentiment
| Category | Everything else |
|---|---|
| Provider host | x402-gateway.blackwoodstate8.workers.dev |
| Networks | eip155:8453 |
| Payment schemes | exact, upto |
| Self-reported calls, 30 days | 3 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
We never call tools that send, buy, move money or file anything, not even without paying.
Example input (from the provider)
{
"body": {
"texts": [
"The checkout was fast and the support team was great.",
"The package arrived broken and nobody answered my emails."
]
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"text": {
"description": "One English text to classify, e.g. The checkout was fast (up to 2000 characters)",
"maxLength": 2000,
"minLength": 1,
"type": "string"
},
"texts": {
"description": "Or a batch of up to 20 English texts, e.g. [\"Great support\", \"Broken on arrival\"]",
"items": {
"maxLength": 2000,
"minLength": 1,
"type": "string"
},
"maxItems": 20,
"minItems": 1,
"type": "array"
}
},
"required": [],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"additionalProperties": false,
"properties": {
"model": {
"type": "string"
},
"next": {
"additionalProperties": false,
"description": "Suggested next paid call in the same family (call it in a loop when the task continues)",
"properties": {
"method": {
"enum": [
"GET",
"POST"
],
"type": "string"
},
"sample": {
"description": "Free fixed sample of the whole family",
"type": "string"
},
"service": {
"description": "Service id of the suggested next paid call",
"type": "string"
},
"tool": {
"description": "MCP tool name of the same call",
"type": "string"
},
"url": {
"description": "Paid route of the next call",
"type": "string"
},
"useWhen": {
"description": "When the next call is the right one",
"type": "string"
}
},
"required": [
"service",
"tool",
"method",
"url",
"useWhen",
"sample"
],
"type": "object"
},
"results": {
"items": {
"additionalProperties": false,
"properties": {
"label": {
"enum": [
"positive",
"negative"
],
"type": "string"
},
"negative": {
"type": "number"
},
"positive": {
"type": "number"
},
"score": {
"type": "number"
},
"text": {
"type": "string"
}
},
"required": [
"text",
"label",
"score",
"positive",
"negative"
],
"type": "object"
},
"type": "array"
}
},
"required": [
"results",
"model"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}