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Returns a succinct, token-optimized answer in natural-language markdown, with full explainability, source citations, and extracted entities. Use knowledge_search (POST /v1/knowledge/search) when you need a human-readable answer rather than raw data. Input can be a Cala QL expression or a natural-language question — both produce the same response shape. See the Structured Answer page for the full QL syntax reference.
  • Automatically identifies and extracts entities from results
  • Every claim is traceable back to its source documents

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Example

{"input": "What are the most promising climate tech startups in Southern Europe?"}
Every response includes four parts:

Answer

A succinct, structured answer in markdown — ready to use directly.
## Spanish Startups with >€10M Funding

### Renewable Energy & Deep Tech

**Altano Energy** — Madrid-based, developing renewable energy projects
across Spain. Secured €60M Series C in 2025 from M&G Investments and Pioneer
Point Partners.

**BeePlanet Factory** — Navarre-based, manufactures energy storage from
EV batteries. Raised €5M, building BeeCycle recycling plant with 10,000 tons/year
capacity by 2026.

**Matteco** — Paterna-based, advanced materials for green hydrogen.
€16.3M raised.

### Market Trends

**Spain** leads Southern Europe with 16 cleantech VC deals in Q1 2025.
**Italy** and **Portugal** emerging as hubs via EU Innovation Fund projects.
**Cleantech for Iberia** drove a 37% increase in clean tech investment.
Every claim in the answer is traced back to specific source documents — so you know exactly why something was said.
[
  {
    "content": "Altano Energy secured a €60 million Series C round in July 2025 from Pioneer Point Partners and M&G Investments.",
    "references": ["f22a1a96-6234-48d7-95c2-8b049f00fdab"]
  },
  {
    "content": "BeePlanet Factory manufactures energy-storage systems from second-life EV batteries and raised approximately $5.3 million.",
    "references": ["521038fd-3c36-4fd4-a6e3-9aa2c0be598d"]
  },
  {
    "content": "Spain accounts for the largest share of cleantech VC activity in Southern Europe, recording 16 deals in Q1 2025.",
    "references": ["27735c7a-f365-48f7-9db4-cf406ce7033e"]
  }
]
Each reference UUID links to a source document in the Sources section below.
Full provenance for every claim — publisher, article title, and URL. Nothing is a black box.
[
  {
    "id": "f22a1a96-6234-48d7-95c2-8b049f00fdab",
    "content": "Altano Energy – €60m (Series C, Jul 2025). Develops and operates renewable energy projects across Spain...",
    "origins": [
      {
        "source": {"name": "Impact Loop", "url": "https://www.impactloop.com/"},
        "document": {
          "name": "Europe's top 25 climate tech funding rounds this year",
          "url": "https://www.impactloop.com/artikel/europe-s-25-largest-climate-tech-fundraises-funding-2025-and-the-investors-behind-them"
        }
      }
    ]
  },
  {
    "id": "521038fd-3c36-4fd4-a6e3-9aa2c0be598d",
    "content": "Matteco: $16.3m raised. Producer of advanced materials for green hydrogen...",
    "origins": [
      {
        "source": {"name": "Seedtable", "url": "https://www.seedtable.com/"},
        "document": {
          "name": "11 Best Climate Tech Green Tech Startups in Spain - 2025",
          "url": "https://www.seedtable.com/best-climate-tech-green-tech-startups-in-spain"
        }
      }
    ]
  },
  {
    "id": "27735c7a-f365-48f7-9db4-cf406ce7033e",
    "content": "Cleantech VC deals took place in 17 of 27 EU member states in Q1 2025. Germany led with 36 deals, followed by Netherlands and France (20 each), Spain (16)...",
    "origins": [
      {
        "source": {"name": "Cleantech for Europe", "url": "https://www.cleantechforeurope.com/"},
        "document": {
          "name": "Cleantech Q1 Briefing 2025",
          "url": "https://www.cleantechforeurope.com/publications/cleantech-q1-briefing-2025"
        }
      }
    ]
  }
]
Every entity mentioned is automatically identified, typed, and assigned a Cala UUID — ready to query further with retrieve_entity.
[
  {"id": "d6b818c0-1d2c-47ca-a7d3-5b5c35635769", "name": "Altano Energy", "entity_type": "Organization"},
  {"id": "c455f44f-6cb1-47b9-bf06-3cffac130dc4", "name": "BeePlanet Factory", "entity_type": "Organization"},
  {"id": "37b9cc58-fd82-4637-a9f9-8409e3e52872", "name": "Matteco", "entity_type": "Organization"},
  {"id": "a44ea7f1-2ce8-462a-9548-0ab4d85780de", "name": "Spain", "entity_type": "GPE"},
  {"id": "56eb4d13-69c8-45d6-aae3-ff2147d2c157", "name": "Madrid", "entity_type": "GPE"},
  {"id": "9ed04484-4df3-47f6-bd77-4e4e50395fa4", "name": "M&G Investments", "entity_type": "Organization"},
  {"id": "6f6532d5-61e8-4f34-b4fe-15c50c57ce4e", "name": "Pioneer Point Partners", "entity_type": "Organization"},
  {"id": "5fefdf5c-cf11-4980-8cc2-5f9ece2bf247", "name": "Navarre", "entity_type": "GPE"},
  {"id": "99dfa2e6-c4ec-4f0e-8501-f35f47d9a764", "name": "BeeCycle", "entity_type": "Facility"},
  {"id": "214f2f14-00a2-4812-bcf6-c95a7f4fc990", "name": "Barcelona", "entity_type": "GPE"},
  {"id": "4f1235e7-f38d-44af-bcab-d66f3956c577", "name": "Italy", "entity_type": "GPE"},
  {"id": "f223b71f-8e67-4493-a4a4-98256f5132f7", "name": "Portugal", "entity_type": "GPE"},
  {"id": "6fbaeb38-4b5e-4de2-8f89-40494584d38d", "name": "European Union Innovation Fund", "entity_type": "Organization"},
  {"id": "38132d67-d0a2-4f5f-a1a6-f49f6ba8a293", "name": "Cleantech for Iberia", "entity_type": "Organization"}
]
Use these UUIDs to get full entity profiles: POST /v1/entities/d6b818c0-1d2c-47ca-a7d3-5b5c35635769 returns everything Cala knows about Altano Energy.

​
Query language input also works

You can also send a plain question — the response shape is identical: 
{"input": "startups.location=Spain.funding>10M"}

​
What you get back

FieldDescription
contentA succinct markdown answer with structured sections
explainabilityReasoning chain — each claim linked to specific source documents by UUID
contextSource documents with full provenance: publisher name, article title, URL
entitiesEvery entity mentioned, with Cala UUIDs and types (Company, Organization, GPE, Facility, etc.)