| name | answers |
| description | USE FOR AI-grounded answers via OpenAI-compatible /chat/completions. Two modes: single-search (fast) or deep research (enable_research=true, thorough multi-search). Streaming/blocking. Citations. |
| version | 1.0.0 |
Answers — AI Grounding
Paid Answers proxy via x402 pay-per-use (HTTP 402).
Prerequisites: This skill requires x402-payment. Complete the setup steps before first use.
Security: Documentation only — no executable code or credentials. Wallet/keys stay on your machine; never stored here.
Service URLs
Endpoint (Agent Interface)
POST /api/x402/answers
Payment Flow (x402 Protocol)
- First request (no
PAYMENT-SIGNATURE) -> 402 Payment Required with requirements JSON
- Client signs (EIP-712) ->
PAYMENT-SIGNATURE
- Retry with
PAYMENT-SIGNATURE -> Server settles and returns response
With @springmint/x402-payment or x402-sdk-go, payment is automatic.
When to Use
| Use Case | Skill | Why |
|---|
| Quick factual answer (raw context) | llm-context | Single search, returns raw context for YOUR LLM |
| Fast AI answer with citations | answers (single-search) | streaming, citations |
| Thorough multi-search deep research | answers (research mode) | Iterative deep research, synthesized cited answer |
This endpoint (/res/v1/chat/completions) supports two modes:
- Single-search (default): Fast AI-grounded answer from a single search. Supports
enable_citations.
- Research (
enable_research=true): Multi-iteration deep research with progress events and synthesized cited answer.
Quick Start (cURL)
Blocking (Single-Search)
curl -X POST "https://www.cpbox.io/api/x402/answers" \
-H "Content-Type: application/json" \
-d '{
"messages": [{"role": "user", "content": "How does the James Webb Space Telescope work?"}],
"model": "default",
"stream": false
}'
Streaming with Citations (Single-Search)
curl -X POST "https://www.cpbox.io/api/x402/answers" \
-H "Content-Type: application/json" \
-d '{
"messages": [{"role": "user", "content": "What are recent breakthroughs in fusion energy?"}],
"model": "default",
"stream": true,
"enable_citations": true
}'
Research Mode
curl -X POST "https://www.cpbox.io/api/x402/answers" \
-H "Content-Type: application/json" \
-d '{
"messages": [{"role": "user", "content": "Compare quantum computing approaches"}],
"model": "default",
"stream": true,
"enable_research": true,
"research_maximum_number_of_iterations": 3,
"research_maximum_number_of_seconds": 120
}'
Using with x402-payment
CLI (AI Agent)
npx @springmint/x402-payment \
--url https://www.cpbox.io/api/x402/answers \
--method POST \
--input '{"messages":[{"role":"user","content":"How does the James Webb Space Telescope work?"}],"model":"default","stream":false}'
Payload/Response
OpenAI-compatible chat.completions JSON + SSE streaming (pass-through).
Two Modes
| Feature | Single-Search (default) | Research (enable_research=true) |
|---|
| Speed | Fast | Slow |
| Searches | 1 | Multiple (iterative) |
| Streaming | Optional (stream=true/false) | Required (stream=true) |
| Citations | enable_citations=true (streaming only) | Built-in (in <answer> tag) |
| Progress events | No | Yes (<progress> tags) |
| Blocking response | Yes (stream=false) | No |
Parameters
Standard Parameters
| Parameter | Type | Required | Default | Description |
|---|
messages | array | Yes | - | Single user message (exactly 1 message) |
model | string | Yes | - | Use "default" |
stream | bool | No | true | Enable SSE streaming |
country | string | No | "US" | Search country (2-letter country code or ALL) |
language | string | No | "en" | Response language |
safesearch | string | No | "moderate" | Search safety level (off, moderate, strict) |
max_completion_tokens | int | No | null | Upper bound on completion tokens |
enable_citations | bool | No | false | Include inline citation tags (single-search streaming only) |
web_search_options | object | No | null | OpenAI-compatible; search_context_size: low, medium, high |
Research Parameters
| Parameter | Type | Required | Default | Description |
|---|
enable_research | bool | No | false | Enable research mode |
research_allow_thinking | bool | No | true | Enable extended thinking |
research_maximum_number_of_tokens_per_query | int | No | 8192 | Max tokens per query (1024-16384) |
research_maximum_number_of_queries | int | No | 20 | Max total search queries (1-50) |
research_maximum_number_of_iterations | int | No | 4 | Max research iterations (1-5) |
research_maximum_number_of_seconds | int | No | 180 | Time budget in seconds (1-300) |
research_maximum_number_of_results_per_query | int | No | 60 | Results per search query (1-60) |
Constraints (IMPORTANT)
| Constraint | Error |
|---|
enable_research=true requires stream=true | "Blocking response doesn't support 'enable_research' option" |
enable_research=true incompatible with enable_citations=true | "Research mode doesn't support 'enable_citations' option" |
enable_citations=true requires stream=true | "Blocking response doesn't support 'enable_citations' option" |
Notes for Agent Usage
- Use
x402-payment to handle the payment handshake automatically, especially for streaming (stream=true).
Response Format
Blocking Response (stream=false, single-search only)
Standard OpenAI-compatible JSON:
{
"id": "chatcmpl-...",
"object": "chat.completion",
"choices": [{"message": {"role": "assistant", "content": "The James Webb Space Telescope works by..."}, "index": 0, "finish_reason": "stop"}],
"usage": {"prompt_tokens": 10, "completion_tokens": 50, "total_tokens": 60}
}
Streaming Response
SSE response with OpenAI-compatible chunks:
data: {"id":"chatcmpl-...","object":"chat.completion.chunk","choices":[{"delta":{"content":"Based on"},"index":0}]}
data: {"id":"chatcmpl-...","object":"chat.completion.chunk","choices":[{"delta":{"content":" recent research"},"index":0}]}
data: [DONE]
Streaming Tags by Mode
Single-Search (with enable_citations=true)
| Tag | Purpose |
|---|
<citation> | Inline citation references |
<usage> | JSON cost/billing data |
Research Mode
| Tag | Purpose | Keep? |
|---|
<queries> | Generated search queries | Debug |
<analyzing> | URL counts (verbose) | Debug |
<thinking> | URL selection reasoning | Debug |
<progress> | Stats: time, iterations, queries, URLs analyzed, tokens | Monitor |
<blindspots> | Knowledge gaps identified | Yes |
<answer> | Final synthesized answer (only the final answer is emitted; intermediate drafts are dropped) | Yes |
<usage> | JSON cost/billing data (included at end of streaming response) | Yes |
Usage Tag Format
The <usage> tag contains JSON-stringified cost and token data:
<usage>{"X-Request-Requests":1,"X-Request-Queries":8,"X-Request-Tokens-In":15000,"X-Request-Tokens-Out":2000,"X-Request-Requests-Cost":0.005,"X-Request-Queries-Cost":0.032,"X-Request-Tokens-In-Cost":0.075,"X-Request-Tokens-Out-Cost":0.01,"X-Request-Total-Cost":0.122}</usage>
Use Cases
- Chat interface integration: Use this endpoint to get a web-grounded answer payload in OpenAI-compatible format.
- Deep research / comprehensive topic research: Use research mode (
enable_research=true) for complex questions needing multi-source synthesis (e.g., "Compare approaches to nuclear fusion").
- OpenAI SDK drop-in: Same SDK, same streaming format — just change
base_url and api_key. Works with both sync and async clients.
- Cited answers: Enable
enable_citations=true in single-search mode for inline citation tags, or use research mode which automatically includes citations in its answer.
Notes
- Timeout: Set client timeout to at least 30s for single-search, 300s (5 min) for research
- Single message: The
messages array must contain exactly 1 user message
- Cost monitoring: Parse the
<usage> tag from streaming responses to track costs
