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arXiv Subject Sets and Categories (arXiv OAI-PMH)

arxivoaipmh/list-sets

Lists every set (subject area) of the arXiv repository with its set code and name: the top-level archives such as physics, math and cs and their subcategories such as physics:astro-ph and cs:cs, about 180 entries. The set codes are what arXiv uses in a record's set membership. Takes no input. Metadata only (CC0), served by Eden Engine; not an official arXiv product.

activeper callv1

Price

$0.0026 per call

You pay the price shown. If a call turns out to cost more than its quote, you pay the actual price, capped at twice the quote. No monthly minimum. Top-ups start at $0.50.

Data source

arXiv

Descriptive metadata from arXiv (arxiv.org, operated by Cornell University) via its OAI-PMH interface, which permits reuse in commercial systems. Courtesy credit: Thank you to arXiv for use of its open access interoperability. E-print full text is not served. Served by Eden Engine; not an official arXiv product.

Use it

Five steps: search, inspect, learn, run, settle. No per-tool setup; your agent reaches this tool through the meta-tools it already has.

Connect once and your AI can find and run this tool, and any other it needs.

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agent
// 1. search: find the tool
omnial_search({ query: "what you need" })

// 2. inspect: price and input schema
omnial_inspect({ tool: "arxivoaipmh/list-sets" })

// 3. learn: read the usage guide at runtime
omnial_learn({ tool: "arxivoaipmh/list-sets" })

// 4. run: price the exact call first, then run it
omnial_execute({ tool: "arxivoaipmh/list-sets", input: { /* see input_schema */ }, dry_run: true })
omnial_execute({ tool: "arxivoaipmh/list-sets", input: { /* ... */ } })

// 5. settle: the call is charged when it finishes, nothing to do

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Pricing

Every charge this tool can incur.

ChargePrice
Per call
$0.0026
Updated
Oct 21, 2026

Input and output schemas

Input schema
input_schema.json
{
  "type": "object",
  "properties": {},
  "additionalProperties": false
}
Output schema
output_schema.json
{
  "type": "object",
  "required": [
    "total",
    "sets"
  ],
  "properties": {
    "sets": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "setSpec",
          "setName"
        ],
        "properties": {
          "setName": {
            "type": "string"
          },
          "setSpec": {
            "type": "string"
          }
        },
        "additionalProperties": true
      },
      "description": "Sets (subject areas) as setSpec and name."
    },
    "total": {
      "type": "integer",
      "description": "Number of sets the repository lists."
    },
    "responseDate": {
      "type": "string"
    }
  },
  "additionalProperties": true
}