Api Endpoint

Evidence402

Find and deduplicate scholarly papers from Crossref and Europe PMC. Use for literature discovery with DOI source links.

Open interactive test console

Offering

Provider: evidence402.onrender.com
Method: POST
Offering type: Api Endpoint
Transport type: http
Category: Science And Education
Delivery: Not provided
Pricing model: Not provided
x402 version: 2

Endpoint context

URL: https://evidence402.onrender.com/api/v1/search
MIME type: Not provided
First seen: 2026-10-16T01:50:38.788Z
Last seen: 2026-11-01T15:06:40.170Z
Tags: Research, citations, Science

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1: 0.01 USDC
Atomic price: 10000 · Network: eip155:8453 · Asset: USDC · Scheme: exact

Raw x402 terms

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "payTo": "0xc60674058497BfcD73a1b74aCc46B66E1AE5176D"
  }
]

Observed health

Status: Reachable
Latest latency: 141 ms
Average latency: 353 ms
HTTP status: 405
Last checked: 2026-11-03T04:14:02.474Z
Reachability: 100% over 9 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "additionalProperties": false,
  "properties": {
    "body": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "additionalProperties": false,
      "properties": {
        "fromYear": {
          "maximum": 2026,
          "minimum": 1900,
          "type": "integer"
        },
        "limit": {
          "default": 10,
          "maximum": 20,
          "minimum": 1,
          "type": "integer"
        },
        "query": {
          "maxLength": 250,
          "minLength": 3,
          "type": "string"
        }
      },
      "required": [
        "query"
      ],
      "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 schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "additionalProperties": false,
      "properties": {
        "body": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "additionalProperties": false,
          "properties": {
            "fromYear": {
              "maximum": 2026,
              "minimum": 1900,
              "type": "integer"
            },
            "limit": {
              "default": 10,
              "maximum": 20,
              "minimum": 1,
              "type": "integer"
            },
            "query": {
              "maxLength": 250,
              "minLength": 3,
              "type": "string"
            }
          },
          "required": [
            "query"
          ],
          "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": {
          "properties": {
            "data": {
              "properties": {
                "papers": {
                  "items": {
                    "type": "object"
                  },
                  "type": "array"
                },
                "query": {
                  "type": "string"
                }
              },
              "type": "object"
            },
            "requestId": {
              "type": "string"
            },
            "service": {
              "type": "string"
            }
          },
          "required": [
            "requestId",
            "service",
            "data"
          ],
          "type": "object"
        },
        "type": {
          "type": "string"
        }
      },
      "required": [
        "type"
      ],
      "type": "object"
    }
  },
  "required": [
    "input"
  ],
  "type": "object"
}