ANTHROPIC-COMPATIBLE /v1/messages — Claude Haiku 4.5 through the exact Anthropic
ANTHROPIC-COMPATIBLE /v1/messages — Claude Haiku 4.5 through the exact Anthropic API dialect: same request/response shape, no Anthropic account, the x402 payment IS the auth. Point an Anthropic SDK's base_url at https://api.webbersites.com and pay per call. Caps: 16,000 input chars, 1,024 output tokens (max_tokens clamped), text-only, no streaming.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
1190 msmedian answer time
$0.01listed price per call
$0.01price it asked us
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://api.webbersites.com/v1/messages
| Category | Market data |
|---|---|
| Provider host | api.webbersites.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 67 from 5 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.01 | 1190 ms |
Example input (from the provider)
{
"body": {
"max_tokens": 256,
"messages": [
{
"content": "Summarize x402 in one sentence.",
"role": "user"
}
],
"model": "claude-haiku-4-5"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"max_tokens": {
"description": "output cap, clamped to 1,024",
"type": "number"
},
"messages": {
"description": "Anthropic-style messages: [{role, content}], text content only, 16,000 chars total",
"type": "array"
},
"model": {
"description": "claude-haiku-4-5 (the only model on this route)",
"type": "string"
},
"system": {
"description": "optional system prompt (counts toward the input cap)",
"type": "string"
}
},
"required": [
"messages"
]
},
"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": {
"properties": {
"content": {
"description": "Anthropic-shape content blocks; the answer is content[0].text",
"type": "array"
},
"stop_reason": {
"type": "string"
},
"usage": {
"type": "object"
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}