Expression Atlas Experiment Summary

gxa/experiment-info

Summary of one EMBL-EBI Expression Atlas experiment from its accession (for example E-MTAB-513, E-PROT-1, E-GEOD-26284): description, species and kingdom, load and update dates, experiment type (baseline or differential) and technology, number of assays, experimental factors and, for differential experiments, the number of contrasts and the array designs. An accession the Atlas does not hold is rejected as an upstream failure. Expression Atlas data, CC BY 4.0, served by Eden Engine; not an official Expression Atlas 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

Expression Atlas (EMBL-EBI)

Data from Expression Atlas, EMBL-EBI (https://www.ebi.ac.uk/gxa), licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Served by Eden Engine; not an official Expression Atlas or EMBL-EBI 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.

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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: "gxa/experiment-info" })

// 3. learn: read the usage guide at runtime
omnial_learn({ tool: "gxa/experiment-info" })

// 4. run: price the exact call first, then run it
omnial_execute({ tool: "gxa/experiment-info", input: { /* see input_schema */ }, dry_run: true })
omnial_execute({ tool: "gxa/experiment-info", 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 25, 2026

Input and output schemas

Input schema

input_schema.json

{
  "type": "object",
  "required": [
    "accession"
  ],
  "properties": {
    "accession": {
      "type": "string",
      "pattern": "^E-[A-Z]{3,5}-[0-9]{1,6}$",
      "description": "Expression Atlas experiment accession, upper case, for example E-MTAB-513, E-PROT-1, E-GEOD-26284 or E-MEXP-1."
    }
  },
  "additionalProperties": false
}

Output schema

output_schema.json

{
  "type": "object",
  "required": [
    "experimentAccession",
    "experimentDescription",
    "species",
    "rawExperimentType"
  ],
  "properties": {
    "kingdom": {
      "type": "string"
    },
    "species": {
      "type": "string"
    },
    "loadDate": {
      "type": [
        "string",
        "null"
      ],
      "description": "Date the experiment was loaded, DD-MM-YYYY."
    },
    "lastUpdate": {
      "type": [
        "string",
        "null"
      ],
      "description": "Date of the last update, DD-MM-YYYY."
    },
    "arrayDesigns": {
      "type": [
        "array",
        "null"
      ],
      "items": {
        "type": [
          "string",
          "null"
        ]
      },
      "description": "ArrayExpress array design accessions; microarray experiments only."
    },
    "experimentType": {
      "type": "string",
      "description": "Baseline or Differential."
    },
    "numberOfAssays": {
      "type": "integer"
    },
    "technologyType": {
      "type": [
        "array",
        "null"
      ],
      "items": {
        "type": [
          "string",
          "null"
        ]
      }
    },
    "arrayDesignNames": {
      "type": [
        "array",
        "null"
      ],
      "items": {
        "type": [
          "string",
          "null"
        ]
      },
      "description": "Array design names; microarray experiments only."
    },
    "numberOfContrasts": {
      "type": [
        "integer",
        "null"
      ],
      "description": "Number of contrasts; present for differential experiments only."
    },
    "rawExperimentType": {
      "type": "string",
      "description": "Experiment design and technology, e.g. RNASEQ_MRNA_BASELINE or MICROARRAY_1COLOUR_MRNA_DIFFERENTIAL."
    },
    "experimentProjects": {
      "type": [
        "array",
        "null"
      ],
      "items": {}
    },
    "experimentAccession": {
      "type": "string",
      "description": "Atlas experiment accession, e.g. E-MTAB-513."
    },
    "experimentalFactors": {
      "type": [
        "array",
        "null"
      ],
      "items": {
        "type": [
          "string",
          "null"
        ]
      }
    },
    "experimentDescription": {
      "type": "string"
    }
  },
  "description": "Summary of one Expression Atlas experiment.",
  "additionalProperties": true
}