> For the complete documentation index, see [llms.txt](https://oracledocs.magpie.gg/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://oracledocs.magpie.gg/build-with-it/api-reference.md).

# API reference

* **Base URL**: `https://magpie.gg/oracle/v1`
* **Auth**: `X-API-Key: mgo_…` header on product endpoints. Verifiability + accuracy endpoints are keyless. CORS is open (header auth, no cookies).
* **Errors**: `401` no key · `403` invalid/revoked key · `404` unknown card/day · `422` bad parameter · `429` rate limited (honours `Retry-After`).
* All values in **EUR**.

## GET /cards — resolve card ids

`?q=charizard 4/102&game=pokemon&limit=20` Name substrings + collector-number tokens. → `{"results":[{"card_id","name","number","game","set","rarity"}]}`

## GET /price — current value

`?card_id=123&printing=Normal&lang=en[&graded=true]`

Raw → `{"available",true, "fair_eur", "low_eur","high_eur", "confidence","n_sales","updated_at", …}`

Graded (`graded=true`) → `{"gem_eur","low_eur","high_eur","confidence", "n_sales","by_grade_value":{"PSA 10":{"value","low","high","n"},…}}`

Cache-first (read-through TTL); a cold value computes live in \~1-2s. `available:false` = we honestly don't know. Only derived values are ever returned (see [Data policy](/build-with-it/data-policy.md)).

## GET /history — daily series

`?card_id=123&printing=Normal&lang=en&days=90` (max 365) → `{"series":[{"t":"2026-07-01","eur":12.4},…]}`

## GET /candles — OHLC

`?card_id=123&tf=1d&days=90[&graded=true]` — `tf ∈ 1h|4h|1d|1w` → `{"candles":[{"t","o","h","l","c","v","n"},…]}` where `v` counts realized sales in the bucket. Empty buckets are absent — no synthetic candles.

## GET /accuracy — public error metrics (keyless)

See [Accuracy](/the-oracle/accuracy.md).

## GET /batch/{day} · GET /proof — verifiability (keyless)

See [Verifiability](/the-oracle/verifiability.md). Past days are served with immutable cache headers.

## Quickstart

```bash
curl -s -H "X-API-Key: $KEY" \
  "https://magpie.gg/oracle/v1/price?card_id=123&graded=true" | jq
```

```ts
const r = await fetch("https://magpie.gg/oracle/v1/candles?card_id=123&tf=4h",
                      { headers: { "X-API-Key": process.env.ORACLE_KEY! } });
const { candles } = await r.json();
```

Versioning: breaking changes only under a new path prefix (`/oracle/v2`); additive fields may appear at any time — parse leniently.


---

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