PubMed search | Vextorium

Search biomedical literature on PubMed (NIH): title, authors, journal, date, DOI, PMID and abstract of each article, newest first, with optional year filter.

SearchLiveeip155:8453Exactvia cdp

https://api.vextorium.com/pubmed-buscar-pago

PubmedMedicineResearchPapersHealth

Calls · 30d

5↑ 48%

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 32 snapshots so far.

$13.51

Verified settled volume

3,580 settlements proven x402 by their on-chain EIP-3009 marker.

$0.0030

Listed price

As published in the catalog. Always read the live 402 before paying.

5

Calls · 30d

Upstream's own call count for this endpoint, not ours.

4

Unique payers · 30d

Last called 2026-10-21 00:21Z

—

Upstream on-chain volume

Reported by the source catalog.

Paid to

0xb9f06D2734B7E9D7b21B64C4D8b95bd774b71aCf

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.003USDC≈ $0.003 USD

on Base · exact scheme

Pay 0.003 USDC on Base to 0xb9f0…71aCf. The signed payment is good for 5 minutes.

Paid to: 0xb9f0…71aCf
USD Coin contract: 0x8335…02913
Payment window: 5 minutes
As published: 3000 smallest units

3000units

on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: HcjfmZ…t3pz2
Token contract: EPjFWd…TDt1v
Payment window: 5 minutes

3000units

on Polygon · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: 0xb9f0…71aCf
Token contract: 0x3c49…c3359
Payment window: 5 minutes

3000units

on Optimism · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: 0xb9f0…71aCf
Token contract: 0x0b2C…7Ff85
Payment window: 168 hours

3000units

on eip155:5042 · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: 0xb9f0…71aCf
Token contract: 0x3600…00000
Payment window: 168 hours

0.003units

on xrpl:0 · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: rEac5r…2pNCp
Token contract: 524C55…00000
Payment window: 5 minutes

2310units

on xrpl:0 · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: rEac5r…2pNCp
Token contract: XRP
Payment window: 5 minutes

The catalog’s raw entry

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xb9f06D2734B7E9D7b21B64C4D8b95bd774b71aCf",
    "amount": "3000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb"
    },
    "payTo": "HcjfmZLgWRZzwj4deEiS7pewc4KBYSw39mW5nTyt3pz2",
    "amount": "3000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xb9f06D2734B7E9D7b21B64C4D8b95bd774b71aCf",
    "amount": "3000",
    "scheme": "exact",
    "network": "eip155:137",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0x0b2C639c533813f4Aa9D7837CAf62653d097Ff85",
    "extra": {
      "name": "GatewayWalletBatched",
      "assets": [
        {
          "symbol": "USDC",
          "address": "0x0b2c639c533813f4aa9d7837caf62653d097ff85",
          "decimals": 6,
          "authorizationVersions": [
            "1",
            "2"
          ]
        }
      ],
      "version": "1",
      "verifyingContract": "0x77777777dcc4d5a8b6e418fd04d8997ef11000ee",
      "minValiditySeconds": 604800
    },
    "payTo": "0xb9f06D2734B7E9D7b21B64C4D8b95bd774b71aCf",
    "amount": "3000",
    "scheme": "exact",
    "network": "eip155:10",
    "maxTimeoutSeconds": 604900
  },
  {
    "asset": "0x3600000000000000000000000000000000000000",
    "extra": {
      "name": "GatewayWalletBatched",
      "assets": [
        {
          "symbol": "USDC",
          "address": "0x3600000000000000000000000000000000000000",
          "decimals": 6,
          "authorizationVersions": [
            "1",
            "2"
          ]
        }
      ],
      "version": "1",
      "verifyingContract": "0x77777777dcc4d5a8b6e418fd04d8997ef11000ee",
      "minValiditySeconds": 604800
    },
    "payTo": "0xb9f06D2734B7E9D7b21B64C4D8b95bd774b71aCf",
    "amount": "3000",
    "scheme": "exact",
    "network": "eip155:5042",
    "maxTimeoutSeconds": 604900
  },
  {
    "asset": "524C555344000000000000000000000000000000",
    "extra": {
      "issuer": "rMxCKbEDwqr76QuheSUMdEGf4B9xJ8m5De",
      "invoiceId": "C911969957864859A6D7E9C98D8B50A0",
      "sourceTag": 804681468,
      "areFeesSponsored": false
    },
    "payTo": "rEac5rTEr7y81iEyrMTrHCRbnktSE2pNCp",
    "amount": "0.003",
    "scheme": "exact",
    "network": "xrpl:0",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "XRP",
    "extra": {
      "invoiceId": "31E2A5874401481CA21E7B95518F6A0F",
      "sourceTag": 804681468,
      "areFeesSponsored": false
    },
    "payTo": "rEac5rTEr7y81iEyrMTrHCRbnktSE2pNCp",
    "amount": "2310",
    "scheme": "exact",
    "network": "xrpl:0",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "limite": 2,
          "consulta": "crispr cancer"
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "json",
        "example": {
          "total": 18230,
          "fuente": "PubMed (NCBI/NLM, EE. UU.)",
          "consulta": "crispr cancer",
          "articulos": [
            {
              "doi": "10.1016/j.cca.2026.121178",
              "pmid": "42285341",
              "fecha": "2027 Jan",
              "enlace": "https://pubmed.ncbi.nlm.nih.gov/42285341/",
              "titulo": "Molecular Landscape and Advanced Diagnostic Technologies for BRAF Mutations in Cancer: From Quantitative PCR and ddPCR to CRISPR-Based Platforms.",
              "autores": [
                "Nejatinejad M",
                "Maleki-Aram A"
              ],
              "resumen": "BRAF mutations are key oncogenic alterations across multiple malignancies, including melanoma, thyroid carcinoma, colorectal cancer, non-small cell lung cancer, glioma, and hairy cell leukemia. The most prevalent variant, BRAF-V600E, induces constitutive activation of the MAPK signaling pathway, pro…",
              "revista": "Clinica chimica acta; international journal of clinical chemistry"
            },
            {
              "doi": "10.1080/19490976.2026.2734649",
              "pmid": "42768305",
              "fecha": "2026 Dec",
              "enlace": "https://pubmed.ncbi.nlm.nih.gov/42768305/",
              "titulo": "CRISPR-Cas immune repertoires as an ecological record of bacterial interactions with mobile genetic elements in the human gut.",
              "autores": [
                "Avershina E",
                "Birkeland EE"
              ],
              "resumen": "Bacteria in the human gut influence host physiology and disease risk, but their ecology is strongly shaped by mobile genetic elements (MGEs) such as phages and plasmids. Past interactions between bacteria and MGEs can be inferred from CRISPR-Cas cassettes, which contain short DNA fragments derived f…",
              "revista": "Gut microbes"
            }
          ]
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "properties": {
            "body": {
              "required": [
                "consulta"
              ],
              "properties": {
                "limite": {
                  "type": "integer"
                },
                "consulta": {
                  "type": "string"
                },
                "desde_año": {
                  "type": "integer"
                }
              }
            },
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "POST"
              ],
              "type": "string"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": [
                "object",
                "null"
              ],
              "properties": {
                "nota": {
                  "type": [
                    "string",
                    "null"
                  ]
                },
                "total": {
                  "type": [
                    "number",
                    "null"
                  ]
                },
                "fuente": {
                  "type": [
                    "string",
                    "null"
                  ]
                },
                "consulta": {
                  "type": [
                    "string",
                    "null"
                  ]
                },
                "articulos": {
                  "type": [
                    "array",
                    "null"
                  ],
                  "items": {
                    "type": [
                      "null",
                      "object"
                    ],
                    "properties": {
                      "doi": {
                        "type": [
                          "string",
                          "null"
                        ]
                      },
                      "pmid": {
                        "type": [
                          "string",
                          "null"
                        ]
                      },
                      "citas": {
                        "type": [
                          "number",
                          "null"
                        ]
                      },
                      "fecha": {
                        "type": [
                          "string",
                          "null"
                        ]
                      },
                      "enlace": {
                        "type": [
                          "string",
                          "null"
                        ]
                      },
                      "titulo": {
                        "type": [
                          "string",
                          "null"
                        ]
                      },
                      "autores": {
                        "type": [
                          "array",
                          "null"
                        ],
                        "items": {
                          "type": [
                            "null",
                            "string"
                          ]
                        }
                      },
                      "revista": {
                        "type": [
                          "string",
                          "null"
                        ]
                      },
                      "acceso_abierto": {}
                    }
                  }
                }
              }
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog: 2026-10-21 00:21Z
Last indexed by Roundhouse: 2026-10-26 14:50Z
Last enriched (probe, favicon, geo): 2026-10-03 03:45Z
x402 version: 2
Max timeout: 300s
Liveness probe: HTTP 200

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 32 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Show the prompt

Using Roundhouse, look up the x402 service PubMed search | Vextorium and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=PubMed%20search%20%7C%20Vextorium'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://api.vextorium.com/pubmed-buscar-pago, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at
GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at
https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.