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Tilth

Tilth publishes a free daily price estimate for nine UK fertiliser grades (ammonium nitrate, granular urea, UAN, DAP, MOP, TSP, polysulphate, imported AN and nitrate sulphur). The data is available as JSON or CSV with no API key and no login, under a CC BY 4.0 licence. Endpoints cover the full estimate history, a latest-snapshot "one number" call, and an overlay against the official DEFRA index. A machine-readable OpenAPI contract is published for agents.

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Tilth
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