Overview

CHUNKER.CC is an AI-native document chunking API with micropayments on Solana. Upload documents and receive semantically chunked text optimized for RAG pipelines and LLM context windows.

Pricing.Matrix

Authentication

Free Tier

No authentication required. Simply POST your file to the endpoint. Limited to 100 pages/day.

Paid Tiers (Structure, Semantic, AI, AI Pro)

Requires USDC payment on Solana. Payment flow:

1. Connect Phantom wallet to the web interface
2. Send USDC to the payment address (automatic)
3. Transaction signature is included in X-PAYMENT header
4. Backend verifies payment on-chain before processing

AI.Agents

Agent-friendly JSON endpoint. No multipart encoding - just send JSON with a document URL.

{
  "url": "https://example.com/document.pdf",
  "tier": "semantic",
  "output_format": "pinecone"
}

# 1. Request without payment - get 402 with payment requirements
curl -X POST https://api.adepti.cc/chunk \
  -H "Content-Type: application/json" \
  -d '{"url": "https://example.com/doc.pdf", "tier": "semantic"}'

# Response: 402 with paymentRequirements

# 2. Pay USDC to the specified address, get transaction signature

# 3. Retry with payment
curl -X POST https://api.adepti.cc/chunk \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: 5K4t...signature..." \
  -d '{"url": "https://example.com/doc.pdf", "tier": "semantic"}'

# Large document response includes download_url
{
  "success": true,
  "total_chunks": 247,
  "download_url": "https://api.adepti.cc/results/standard_a1b2c3d4e5f6",
  "expires_in": "60 minutes"
}

# Fetch full results
curl https://api.adepti.cc/results/standard_a1b2c3d4e5f6

API.Endpoints

curl https://api.adepti.cc/

curl https://api.adepti.cc/health

// Response
{ "status": "healthy", "network": "solana-mainnet" }

curl -X POST https://api.adepti.cc/chunk/demo \
  -F "[email protected]"

curl -X POST https://api.adepti.cc/chunk/standard \
  -H "X-PAYMENT: 5K4t...signature..." \
  -F "[email protected]"

curl -X POST https://api.adepti.cc/chunk/semantic \
  -H "X-PAYMENT: 5K4t...signature..." \
  -F "[email protected]"

curl -X POST https://api.adepti.cc/chunk/ai \
  -H "X-PAYMENT: 5K4t...signature..." \
  -F "[email protected]"

curl -X POST https://api.adepti.cc/chunk/ai-pro \
  -H "X-PAYMENT: 5K4t...signature..." \
  -F "[email protected]"

Response.Format

All chunking endpoints return the same response structure:

{
  "success": true,
  "tier": "standard",
  "total_chunks": 12,
  "metadata": {
    "filename": "document.txt",
    "content_type": "text/plain",
    "size_bytes": 15420,
    "estimated_pages": 3
  },
  "chunks": [
    {
      "text": "First chunk content...",
      "metadata": {
        "chunk_index": 0,
        "char_count": 1024
      }
    },
    {
      "text": "Second chunk content...",
      "metadata": {
        "chunk_index": 1,
        "char_count": 987
      }
    }
  ],
  "payment": {
    "amount": 1000,
    "asset": "USDC",
    "network": "solana-mainnet"
  }
}

Error.Handling

402 Payment Required Response

{
  "error": "Payment Required",
  "paymentRequirements": {
    "x402Version": 1,
    "scheme": "exact",
    "network": "solana-mainnet",
    "maxAmountRequired": "4000",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "payTo": "8hTm...dWT",
    "description": "Semantic tier embedding-based chunking"
  }
}