HAL Open Archive Publication Search

halsearch/search-publications

Search HAL, the French open archive of articles, conference papers, theses, preprints and reports: each hit gives the title, authors, production date, document type, journal, DOI, open-access flag and the record's landing page link. The query is a Solr query, so plain words work and fields such as docType_s:ART or authLastName_t:Curie narrow it. 1 to 50 records per page, best match first or sorted by date.

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 $5.

Data source

HAL

Bibliographic records from HAL, the French open archive run by the Centre pour la communication scientifique directe (CCSD) (hal.science). The records are metadata; each deposited full text carries its own licence, so link back to the record's uri_s. Served by Eden Engine; not an official HAL or CCSD 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.

Install it Create an account

agent

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

// 2. inspect: price and input schema
omnial_inspect({ tool: "halsearch/search-publications" })

// 3. learn: read the usage guide at runtime
omnial_learn({ tool: "halsearch/search-publications" })

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

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

Not connected yet? Point your MCP client at https://mcp.eden-engine.com/mcp, then copy a config for your client.

Pricing

Every charge this tool can incur.

Charge	Price
Per call	$0.0026

Updated: Oct 21, 2026

Input and output schemas

Input schema

input_schema.json

{
  "type": "object",
  "required": [
    "q"
  ],
  "properties": {
    "q": {
      "type": "string",
      "maxLength": 300,
      "minLength": 1,
      "description": "The search: plain words (climat) or a Solr query such as 'docType_s:THESE AND climat'. Matches all fields by default; the text fields are title_t, abstract_t, authFullName_t."
    },
    "rows": {
      "type": "integer",
      "default": 10,
      "maximum": 50,
      "minimum": 1,
      "description": "Records per page, 1 to 50. Default 10."
    },
    "sort": {
      "enum": [
        "producedDate_tdate desc",
        "producedDate_tdate asc"
      ],
      "type": "string",
      "description": "Leave out for best match first. 'producedDate_tdate desc' puts the newest works first, 'producedDate_tdate asc' the oldest."
    },
    "start": {
      "type": "integer",
      "maximum": 9950,
      "minimum": 0,
      "description": "Offset of the first record, for paging: 0 is the first page, 10 with rows 10 the second. Leave out for the start."
    }
  },
  "additionalProperties": false
}

Output schema

output_schema.json

{
  "type": "object",
  "required": [
    "response"
  ],
  "properties": {
    "response": {
      "type": "object",
      "required": [
        "numFound",
        "docs"
      ],
      "properties": {
        "docs": {
          "type": "array",
          "items": {
            "type": "object",
            "properties": {
              "docid": {
                "type": "string",
                "description": "HAL's internal document number."
              },
              "uri_s": {
                "type": "string",
                "description": "The record's landing page, which holds its licence and full text."
              },
              "doiId_s": {
                "type": "string"
              },
              "halId_s": {
                "type": "string",
                "description": "The HAL identifier, for example hal-01234567."
              },
              "title_s": {
                "type": "array",
                "items": {
                  "type": "string"
                },
                "description": "Title, in the language of the deposit."
              },
              "docType_s": {
                "type": "string",
                "description": "Document type code: ART article, COMM conference paper, THESE thesis, OUV book, COUV chapter, REPORT, MEM dissertation, UNDEFINED preprint, and others."
              },
              "authFullName_s": {
                "type": "array",
                "items": {
                  "type": "string"
                },
                "description": "Author names, in order."
              },
              "journalTitle_s": {
                "type": "string"
              },
              "producedDate_s": {
                "type": "string",
                "description": "When the work was produced: YYYY, YYYY-MM or YYYY-MM-DD."
              },
              "openAccess_bool": {
                "type": "boolean",
                "description": "Whether a full text is deposited in open access."
              }
            },
            "additionalProperties": true
          },
          "description": "The records on this page; empty when nothing matches."
        },
        "start": {
          "type": "integer",
          "description": "Offset of the first document returned."
        },
        "maxScore": {
          "type": "number"
        },
        "numFound": {
          "type": "integer",
          "description": "Total matches across all pages."
        },
        "numFoundExact": {
          "type": "boolean"
        }
      },
      "additionalProperties": true
    }
  },
  "additionalProperties": true
}