med.halowerk.com

Name: med.halowerk.com
Price: 0.005 USDC
Availability: InStock

HALOWERK provides paid endpoints that AI agents call and pay for per request via x402 on Base. No account, no API key, no signup.

SearchLiveeip155:8453Exactvia cdp

https://med.halowerk.com/v1/molecule-identity

Calls · 30d

1→ 0%

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 18 snapshots so far.

$11.47

Verified settled volume

2,655 settlements proven x402 by their on-chain EIP-3009 marker.

$0.0050

Listed price

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

Calls · 30d

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

Unique payers · 30d

Last called 2026-08-11 20:33Z

—

Upstream on-chain volume

Reported by the source catalog.

Paid to

0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E

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.

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "docs": "https://med.halowerk.com/llms.txt",
  "name": "molecule_identity",
  "error": "payment_required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "asset": "USDC",
        "version": "2",
        "eip712Domain": {
          "name": "USD Coin",
          "chainId": 8453,
          "version": "2",
          "verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
        },
        "network_name": "Base Mainnet",
        "assetTransferMethod": "eip3009"
      },
      "payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
      "amount": "5000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "pricing": "https://med.halowerk.com/pricing",
  "resource": {
    "url": "https://med.halowerk.com/v1/molecule-identity",
    "mimeType": "application/json",
    "description": "Takes any common identifier for a chemical and returns the canonical PubChem compound: the CID, molecular formula, molecular weight, canonical and isomeric SMILES, InChI and InChI key, the IUPAC name, and the computed properties that decide most downstream work — logP, exact mass, polar surface area, hydrogen bond donors and acceptors, rotatable bonds and formal charge."
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "query": "aspirin"
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json"
        }
      },
      "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": {
                "type": "object",
                "required": [
                  "query"
                ],
                "properties": {
                  "query": {
                    "type": "string",
                    "maxLength": 500,
                    "minLength": 1,
                    "description": "Name, CID, SMILES, InChI key or molecular formula."
                  },
                  "input_type": {
                    "enum": [
                      "auto",
                      "name",
                      "cid",
                      "smiles",
                      "inchikey",
                      "formula"
                    ],
                    "type": "string",
                    "default": "auto"
                  },
                  "include_synonyms": {
                    "type": "boolean",
                    "default": false
                  }
                },
                "additionalProperties": false
              },
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "POST",
                  "PUT",
                  "PATCH"
                ],
                "type": "string"
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              }
            },
            "additionalProperties": false
          }
        }
      }
    }
  },
  "price_usdc": "0.005",
  "description": "Takes any common identifier for a chemical and returns the canonical PubChem compound: the CID, molecular formula, molecular weight, canonical and isomeric SMILES, InChI and InChI key, the IUPAC name, and the computed properties that decide most downstream work — logP, exact mass, polar surface area, hydrogen bond donors and acceptors, rotatable bonds and formal charge. Ambiguity is checked and reported first rather than resolved silently: common names frequently match several compounds because they do not distinguish stereoisomers, and glucose is the standard example where one form is a nutrient and the mirror image is not metabolised. When a name maps to more than one CID the alternatives are listed with their formulas so the difference is visible. Isomeric SMILES is returned alongside canonical SMILES for the same reason — canonical SMILES discards stereochemistry, and a workflow that keeps only that has silently merged two different substances. Synonyms are returned on request, capped and counted.",
  "inputSchema": {
    "type": "object",
    "required": [
      "query"
    ],
    "properties": {
      "query": {
        "type": "string",
        "maxLength": 500,
        "minLength": 1,
        "description": "Name, CID, SMILES, InChI key or molecular formula."
      },
      "input_type": {
        "enum": [
          "auto",
          "name",
          "cid",
          "smiles",
          "inchikey",
          "formula"
        ],
        "type": "string",
        "default": "auto"
      },
      "include_synonyms": {
        "type": "boolean",
        "default": false
      }
    },
    "additionalProperties": false
  },
  "price_model": "per_call",
  "x402Version": 2,
  "instructions": "Sign the accepted terms with an x402 client and repeat the request with the payment header.",
  "payment_header": "PAYMENT-SIGNATURE",
  "capability_request": {
    "url": "https://bedarf.halowerk.com/capabilities/request",
    "cost": "free",
    "method": "POST",
    "description": "Missing a capability, or does the scope not fit? Report the need here - no payment required. Similar reports are bundled; the response returns an id you can check back on.",
    "body_example": {
      "max_price": 0.01,
      "description": "what exactly is needed",
      "requested_capability": "short label"
    }
  }
}

Accepts

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

0.005USDC≈ $0.005 USD

on Base · exact scheme

Pay 0.005 USDC on Base to 0x2880…C4E5E. The signed payment is good for 5 minutes.

Paid to: 0x2880…C4E5E
USD Coin contract: 0x8335…02913
Payment window: 5 minutes
As published: 5000 smallest units

The catalog’s raw entry

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "asset": "USDC",
      "version": "2",
      "eip712Domain": {
        "name": "USD Coin",
        "chainId": 8453,
        "version": "2",
        "verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
      },
      "network_name": "Base Mainnet",
      "assetTransferMethod": "eip3009"
    },
    "payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
    "amount": "5000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "query": "aspirin"
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      }
    },
    "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": {
              "type": "object",
              "required": [
                "query"
              ],
              "properties": {
                "query": {
                  "type": "string",
                  "maxLength": 500,
                  "minLength": 1,
                  "description": "Name, CID, SMILES, InChI key or molecular formula."
                },
                "input_type": {
                  "enum": [
                    "auto",
                    "name",
                    "cid",
                    "smiles",
                    "inchikey",
                    "formula"
                  ],
                  "type": "string",
                  "default": "auto"
                },
                "include_synonyms": {
                  "type": "boolean",
                  "default": false
                }
              },
              "additionalProperties": false
            },
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "POST",
                "PUT",
                "PATCH"
              ],
              "type": "string"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            }
          },
          "additionalProperties": false
        }
      }
    }
  }
}

Provenance

Seen in the source catalog: 2026-08-11 20:33Z
Last indexed by Roundhouse: 2026-09-10 20:30Z
Last enriched (probe, favicon, geo): 2026-09-21 06:15Z
x402 version: 2
Max timeout: 300s
Liveness probe: HTTP 402

Report

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. 18 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md

Show the prompt

Using Roundhouse, look up the x402 service med.halowerk.com 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=med.halowerk.com'
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://med.halowerk.com/v1/molecule-identity, 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. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402,
or use an organization key from https://roundhouseai.io/dashboard/team.

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