{
  "x402Version": 2,
  "id": 33819,
  "slug": "33819",
  "resource": "https://x402.agentindex.world/research",
  "description": "Jev-powered research: routed search, cited answer, claims verified against sources. Ask a question, get a 5-8 sentence answer, each claim tagged to a numbered source, built from real page content - no invented facts. A fast paid LLM writes it, under 4.5s guaranteed; on a rare miss, a no-LLM extractive fallback (top sentences from the sources, picked by Jev) takes over instead, marked \"synthesis\":\"extractive\". Try GET /research/sample.",
  "type": "http",
  "serviceName": "cited-research",
  "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1790530885/bazaar-icons/fde5dd6af2b2b42f.png",
  "resourceType": "AI Inference",
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0xb3F32bdfe8D07825BC0D7387295aB1D7559BA69d",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "5000",
      "amountUsd": 0.005,
      "maxTimeoutSeconds": 300
    }
  ],
  "outputSchema": {
    "properties": {
      "example": {
        "properties": {
          "answer": {
            "description": "5-8 sentences, each claim cited inline as [n] referring to the sources array (1-indexed).",
            "type": "string"
          },
          "claims_verified": {
            "description": "True only if a Jev check confirmed the answer's citations are supported. False if unsupported OR if verification was skipped/timed out - see claims_verified_reason.",
            "type": "boolean"
          },
          "claims_verified_reason": {
            "description": "Why claims_verified is false: 'jev_found_unsupported_claim', 'verification_timed_out_or_failed', 'insufficient_time_budget_remaining', or null when verified true.",
            "type": [
              "string",
              "null"
            ]
          },
          "query": {
            "type": "string"
          },
          "sources": {
            "items": {
              "properties": {
                "published_at": {
                  "type": [
                    "string",
                    "null"
                  ]
                },
                "source": {
                  "type": "string"
                },
                "title": {
                  "type": "string"
                },
                "url": {
                  "type": "string"
                }
              },
              "type": "object"
            },
            "type": "array"
          },
          "synthesis": {
            "description": "'llm' when a paid fast model wrote the answer (the common case). 'extractive' when that model missed its own tight time cap and the answer is instead the most relevant sentences already present in the sources, verbatim, picked by Jev - never a second LLM call.",
            "enum": [
              "llm",
              "extractive"
            ],
            "type": "string"
          },
          "timing_ms": {
            "description": "search, synthesis, verify, total, in milliseconds.",
            "type": "object"
          },
          "x402_receipt": {
            "description": "Billing and provenance receipt for this call.",
            "type": "object"
          }
        },
        "required": [
          "query",
          "answer",
          "synthesis",
          "sources",
          "claims_verified",
          "timing_ms"
        ],
        "type": "object"
      },
      "type": {
        "type": "string"
      }
    },
    "required": [
      "type"
    ],
    "type": "object"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "query": "What are the main features of the Rust programming language?"
          },
          "bodyType": "json",
          "method": "POST",
          "type": "http"
        },
        "output": {
          "example": {
            "answer": "The main features of the Rust programming language include an emphasis on performance, type safety, concurrency, and memory safety [1]. Rust supports multiple programming paradigms [1]. The language's syntax is heavily influenced by C++ and functional programming languages such as OCaml [2]. Rust has a focus on static typing and a borrow system, similar to other systems programming languages [5]. However, sources [3] and [4] do not provide information about Rust, instead discussing other programming languages, Zig and V, respectively. Overall, the sources suggest that Rust is a systems programming language with a strong focus on safety and performance [1][2][5].",
            "claims_verified": true,
            "claims_verified_reason": null,
            "query": "What are the main features of the Rust programming language?",
            "sources": [
              {
                "published_at": null,
                "source": "wikipedia",
                "title": "Rust (programming language)",
                "url": "https://en.wikipedia.org/wiki/Rust_(programming_language)"
              },
              {
                "published_at": null,
                "source": "wikipedia",
                "title": "Rust syntax",
                "url": "https://en.wikipedia.org/wiki/Rust_syntax"
              },
              {
                "published_at": null,
                "source": "wikipedia",
                "title": "Zig (programming language)",
                "url": "https://en.wikipedia.org/wiki/Zig_(programming_language)"
              },
              {
                "published_at": null,
                "source": "wikipedia",
                "title": "V (programming language)",
                "url": "https://en.wikipedia.org/wiki/V_(programming_language)"
              },
              {
                "published_at": null,
                "source": "wikipedia",
                "title": "Mojo (programming language)",
                "url": "https://en.wikipedia.org/wiki/Mojo_(programming_language)"
              }
            ],
            "synthesis": "llm",
            "timing_ms": {
              "search": 1230,
              "synthesis": 644,
              "total": 2160,
              "verify": 287
            }
          },
          "type": "json"
        }
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "additionalProperties": false,
            "properties": {
              "body": {
                "properties": {
                  "max_sources": {
                    "description": "How many web sources to consider, 1-10. Default 5.",
                    "type": "integer"
                  },
                  "query": {
                    "description": "The research question to answer, up to 500 characters.",
                    "type": "string"
                  }
                },
                "required": [
                  "query"
                ]
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              },
              "method": {
                "enum": [
                  "POST",
                  "PUT",
                  "PATCH"
                ],
                "type": "string"
              },
              "type": {
                "const": "http",
                "type": "string"
              }
            },
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "type": "object"
          },
          "output": {
            "properties": {
              "example": {
                "properties": {
                  "answer": {
                    "description": "5-8 sentences, each claim cited inline as [n] referring to the sources array (1-indexed).",
                    "type": "string"
                  },
                  "claims_verified": {
                    "description": "True only if a Jev check confirmed the answer's citations are supported. False if unsupported OR if verification was skipped/timed out - see claims_verified_reason.",
                    "type": "boolean"
                  },
                  "claims_verified_reason": {
                    "description": "Why claims_verified is false: 'jev_found_unsupported_claim', 'verification_timed_out_or_failed', 'insufficient_time_budget_remaining', or null when verified true.",
                    "type": [
                      "string",
                      "null"
                    ]
                  },
                  "query": {
                    "type": "string"
                  },
                  "sources": {
                    "items": {
                      "properties": {
                        "published_at": {
                          "type": [
                            "string",
                            "null"
                          ]
                        },
                        "source": {
                          "type": "string"
                        },
                        "title": {
                          "type": "string"
                        },
                        "url": {
                          "type": "string"
                        }
                      },
                      "type": "object"
                    },
                    "type": "array"
                  },
                  "synthesis": {
                    "description": "'llm' when a paid fast model wrote the answer (the common case). 'extractive' when that model missed its own tight time cap and the answer is instead the most relevant sentences already present in the sources, verbatim, picked by Jev - never a second LLM call.",
                    "enum": [
                      "llm",
                      "extractive"
                    ],
                    "type": "string"
                  },
                  "timing_ms": {
                    "description": "search, synthesis, verify, total, in milliseconds.",
                    "type": "object"
                  },
                  "x402_receipt": {
                    "description": "Billing and provenance receipt for this call.",
                    "type": "object"
                  }
                },
                "required": [
                  "query",
                  "answer",
                  "synthesis",
                  "sources",
                  "claims_verified",
                  "timing_ms"
                ],
                "type": "object"
              },
              "type": {
                "type": "string"
              }
            },
            "required": [
              "type"
            ],
            "type": "object"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      }
    }
  },
  "tags": [
    "research report with sources",
    "cited answer",
    "web research",
    "bazaar"
  ],
  "sourceHost": "x402.agentindex.world",
  "lastUpdated": "2026-10-08T06:09:20.376Z",
  "quality": {
    "calls30d": 3,
    "uniquePayers30d": 3,
    "lastCalledAt": "2026-10-08T06:09:20.181Z"
  },
  "metadata": {
    "serviceName": "cited-research",
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1790530885/bazaar-icons/fde5dd6af2b2b42f.png",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "query": "What are the main features of the Rust programming language?"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "answer": "The main features of the Rust programming language include an emphasis on performance, type safety, concurrency, and memory safety [1]. Rust supports multiple programming paradigms [1]. The language's syntax is heavily influenced by C++ and functional programming languages such as OCaml [2]. Rust has a focus on static typing and a borrow system, similar to other systems programming languages [5]. However, sources [3] and [4] do not provide information about Rust, instead discussing other programming languages, Zig and V, respectively. Overall, the sources suggest that Rust is a systems programming language with a strong focus on safety and performance [1][2][5].",
              "claims_verified": true,
              "claims_verified_reason": null,
              "query": "What are the main features of the Rust programming language?",
              "sources": [
                {
                  "published_at": null,
                  "source": "wikipedia",
                  "title": "Rust (programming language)",
                  "url": "https://en.wikipedia.org/wiki/Rust_(programming_language)"
                },
                {
                  "published_at": null,
                  "source": "wikipedia",
                  "title": "Rust syntax",
                  "url": "https://en.wikipedia.org/wiki/Rust_syntax"
                },
                {
                  "published_at": null,
                  "source": "wikipedia",
                  "title": "Zig (programming language)",
                  "url": "https://en.wikipedia.org/wiki/Zig_(programming_language)"
                },
                {
                  "published_at": null,
                  "source": "wikipedia",
                  "title": "V (programming language)",
                  "url": "https://en.wikipedia.org/wiki/V_(programming_language)"
                },
                {
                  "published_at": null,
                  "source": "wikipedia",
                  "title": "Mojo (programming language)",
                  "url": "https://en.wikipedia.org/wiki/Mojo_(programming_language)"
                }
              ],
              "synthesis": "llm",
              "timing_ms": {
                "search": 1230,
                "synthesis": 644,
                "total": 2160,
                "verify": 287
              }
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "properties": {
                    "max_sources": {
                      "description": "How many web sources to consider, 1-10. Default 5.",
                      "type": "integer"
                    },
                    "query": {
                      "description": "The research question to answer, up to 500 characters.",
                      "type": "string"
                    }
                  },
                  "required": [
                    "query"
                  ]
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST",
                    "PUT",
                    "PATCH"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "answer": {
                      "description": "5-8 sentences, each claim cited inline as [n] referring to the sources array (1-indexed).",
                      "type": "string"
                    },
                    "claims_verified": {
                      "description": "True only if a Jev check confirmed the answer's citations are supported. False if unsupported OR if verification was skipped/timed out - see claims_verified_reason.",
                      "type": "boolean"
                    },
                    "claims_verified_reason": {
                      "description": "Why claims_verified is false: 'jev_found_unsupported_claim', 'verification_timed_out_or_failed', 'insufficient_time_budget_remaining', or null when verified true.",
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "query": {
                      "type": "string"
                    },
                    "sources": {
                      "items": {
                        "properties": {
                          "published_at": {
                            "type": [
                              "string",
                              "null"
                            ]
                          },
                          "source": {
                            "type": "string"
                          },
                          "title": {
                            "type": "string"
                          },
                          "url": {
                            "type": "string"
                          }
                        },
                        "type": "object"
                      },
                      "type": "array"
                    },
                    "synthesis": {
                      "description": "'llm' when a paid fast model wrote the answer (the common case). 'extractive' when that model missed its own tight time cap and the answer is instead the most relevant sentences already present in the sources, verbatim, picked by Jev - never a second LLM call.",
                      "enum": [
                        "llm",
                        "extractive"
                      ],
                      "type": "string"
                    },
                    "timing_ms": {
                      "description": "search, synthesis, verify, total, in milliseconds.",
                      "type": "object"
                    },
                    "x402_receipt": {
                      "description": "Billing and provenance receipt for this call.",
                      "type": "object"
                    }
                  },
                  "required": [
                    "query",
                    "answer",
                    "synthesis",
                    "sources",
                    "claims_verified",
                    "timing_ms"
                  ],
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    }
  },
  "liveness": {
    "reliability": null
  },
  "verified": false,
  "featured": false,
  "provider": {
    "host": "x402.agentindex.world",
    "manifest_name": "x402.agentindex.world",
    "source": "cdp-mirror",
    "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources",
    "submitted_at": "2026-10-14T01:15:01.050Z"
  },
  "exampleResponse": {
    "example": {
      "answer": "string",
      "claims_verified": true,
      "claims_verified_reason": "string",
      "query": "string",
      "sources": [
        {
          "published_at": "string",
          "source": "string",
          "title": "string",
          "url": "string"
        }
      ],
      "synthesis": "llm",
      "timing_ms": {},
      "x402_receipt": {}
    },
    "type": "string"
  }
}