AgentIndex x402

Real-time web search and content retrieval - up to 10 results with title, URL, snippet and publish date, plus clean full-page Markdown for the top 3 results by default and an optional short summary. Also accepts up to 5 queries in one call, merged and de-duplicated - one call instead of five. No account, no API key, no quota. Try GET /search/sample. Part of the AgentIndex content kit (pdf, web-read, extract, summarize, detect-language) - see GET /capabilities.

{
  "type": "object",
  "properties": {
    "query": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "items": {
            "type": "string"
          },
          "type": "array"
        }
      ]
    },
    "max_results": {
      "default": 5,
      "type": "integer"
    },
    "extract": {
      "default": true,
      "type": "boolean"
    },
    "include_content": {
      "default": true,
      "type": "boolean"
    },
    "content_results": {
      "default": 3,
      "type": "integer"
    },
    "content_chars": {
      "default": 12000,
      "type": "integer"
    },
    "summarize": {
      "default": false,
      "type": "boolean"
    }
  },
  "required": [
    "query"
  ],
  "additionalProperties": false
}

Translate up to 200 text segments in a single call - the same result that would otherwise take 200 separate calls to translate a whole file. Markdown, HTML and {x} placeholders preserved per segment, order and count kept intact, source language auto-detected, automatic fallback across multiple models for uptime, providers that train on submitted prompts excluded. A single string also works. No account, no API key. Try GET /translate/sample.

{
  "type": "object",
  "properties": {
    "text": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "items": {
            "type": "string"
          },
          "type": "array"
        }
      ]
    },
    "target_lang": {
      "type": "string"
    },
    "source_lang": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "preserve_format": {
      "default": true,
      "type": "boolean"
    }
  },
  "required": [
    "text",
    "target_lang"
  ],
  "additionalProperties": false
}

Multi-query web research, read and synthesized into one sourced JSON brief in a single call - what would otherwise cost an agent twenty calls and its whole context window. Free status polling and result retrieval. Try GET /jobs/sample.

{
  "type": "object",
  "properties": {
    "subject": {
      "type": "string"
    }
  },
  "required": [
    "subject"
  ],
  "additionalProperties": false
}

Extract a public PDF (by HTTPS URL or base64) into clean Markdown - headings and tables preserved via layout-aware parsing, plus title/author/page count/date metadata and a real token count. Text content itself is never generated or altered, only its structure is inferred. Try GET /pdf/sample. Part of the AgentIndex content kit (pdf, web-read, extract, summarize, detect-language) - see GET /capabilities.

{
  "type": "object",
  "properties": {
    "url": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "pdf_base64": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    }
  },
  "additionalProperties": false
}

Fetch a URL and return its main article as clean markdown - navigation, ads and boilerplate stripped, links resolved, plus a real token count. The same extraction /search uses on result pages, exposed standalone for a URL you already have. Try GET /web-read/sample. Part of the AgentIndex content kit (pdf, web-read, extract, summarize, detect-language) - see GET /capabilities.

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string"
    }
  },
  "required": [
    "url"
  ],
  "additionalProperties": false
}

Extract structured data from a URL or raw text into strict JSON matching a schema you provide. Fields the content doesn't support come back null - never an invented or approximate value, and an unmatchable schema returns an explicit error. Try GET /extract/sample. Part of the AgentIndex content kit (pdf, web-read, extract, summarize, detect-language) - see GET /capabilities.

{
  "type": "object",
  "properties": {
    "schema": {
      "additionalProperties": true,
      "type": "object"
    },
    "url": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "text": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    }
  },
  "required": [
    "schema"
  ],
  "additionalProperties": false
}

Summarize a URL, raw text or HTML at the length you request - short, medium or long - with the source noted. Neutral and factual, no invented facts. Try GET /summarize/sample. Part of the AgentIndex content kit (pdf, web-read, extract, summarize, detect-language) - see GET /capabilities.

{
  "type": "object",
  "properties": {
    "url": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "text": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "html": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "length": {
      "default": "medium",
      "type": "string"
    }
  },
  "additionalProperties": false
}

Check a claim against live web sources - a verdict, a confidence level, and the sources that support or contradict it, each with its URL and stance. Returns 'inconclusive' rather than a guess when the sources don't clearly settle it. Try GET /fact-check/sample. Part of the AgentIndex content kit (pdf, web-read, extract, summarize, detect-language) - see GET /capabilities.

{
  "type": "object",
  "properties": {
    "claim": {
      "type": "string"
    }
  },
  "required": [
    "claim"
  ],
  "additionalProperties": false
}

Current weather and a 3-day forecast for any city or lat/lon - temperature, humidity, wind, conditions. No account, no API key. Try GET /weather/sample.

{
  "type": "object",
  "properties": {
    "city": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "lat": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "lon": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    }
  },
  "additionalProperties": false
}

Live spot prices for crypto coins (BTC, ETH, SOL, ...) in USD or another fiat, with 24h change. Accepts tickers or CoinGecko ids. Try GET /crypto/sample.

{
  "type": "object",
  "properties": {
    "coins": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "items": {
            "type": "string"
          },
          "type": "array"
        }
      ]
    },
    "vs_currency": {
      "default": "usd",
      "type": "string"
    }
  },
  "required": [
    "coins"
  ],
  "additionalProperties": false
}

Top Hacker News headlines right now - title, URL, score, comments. Fresh links for agents that need current tech/startup signal. Try GET /news/sample.

{
  "type": "object",
  "properties": {
    "limit": {
      "default": 10,
      "type": "integer"
    }
  },
  "additionalProperties": false
}

Check whether a Base wallet holds enough USDC to pay an x402 amount (default $0.001). Returns balance, can_pay, shortfall. The checklist agents run before spending. Try GET /can-pay/sample.

{
  "type": "object",
  "properties": {
    "address": {
      "type": "string"
    },
    "amount": {
      "default": 0.001,
      "type": "number"
    }
  },
  "required": [
    "address"
  ],
  "additionalProperties": false
}

Probe any public URL and report if it is an x402 paywall - price, network, payTo, scheme. Shop paywalls before you spend. Try GET /probe/sample.

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string"
    },
    "method": {
      "default": "GET",
      "type": "string"
    }
  },
  "required": [
    "url"
  ],
  "additionalProperties": false
}

Read native coin and USDC balances for any EVM wallet on Base, Ethereum, Polygon, Arbitrum or Optimism, with atomic amounts and current block. No RPC key or account. Try GET /wallet-balance/sample.

{
  "type": "object",
  "properties": {
    "address": {
      "type": "string"
    },
    "network": {
      "default": "base",
      "type": "string"
    }
  },
  "required": [
    "address"
  ],
  "additionalProperties": false
}

Read the live gas price, EIP-1559 base fee and estimated native-transfer cost on Base, Ethereum, Polygon, Arbitrum or Optimism. No RPC key or account. Try GET /gas-price/sample.

{
  "type": "object",
  "properties": {
    "network": {
      "default": "base",
      "type": "string"
    }
  },
  "additionalProperties": false
}

One call replaces wallet-balance and gas reads across Base, Ethereum, Polygon, Arbitrum and Optimism. Returns native and USDC balances, current blocks, fees and Base x402 payment readiness. One signature instead of ten paid requests. Try GET /wallet-intelligence/sample.

{
  "type": "object",
  "properties": {
    "address": {
      "type": "string"
    },
    "networks": {
      "anyOf": [
        {
          "items": {
            "type": "string"
          },
          "type": "array"
        },
        {
          "type": "null"
        }
      ],
      "default": null
    },
    "amount_usdc": {
      "default": 0.001,
      "type": "number"
    }
  },
  "required": [
    "address"
  ],
  "additionalProperties": false
}

Cheapest possible Base-mainnet x402 conformance call: settle $0.001 of USDC and receive payer identity, request echo and receipt. Built for agents testing wallets, Payment-Signature, facilitators and settlement. Try GET /x402-echo/sample.

{
  "type": "object",
  "properties": {
    "message": {
      "default": "hello agent",
      "type": "string"
    }
  },
  "additionalProperties": false
}

Fresh operational audit of any public agent or paid API: reachability, latency, HTTP status, x402 challenge, price/network/payTo, OpenAPI, agent card and MCP manifest. Returns a 0-100 score, verdict and issues. Try GET /agent-health/sample.

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string"
    },
    "method": {
      "default": "GET",
      "type": "string"
    }
  },
  "required": [
    "url"
  ],
  "additionalProperties": false
}