diff --git a/backend/app/routers/achats.py b/backend/app/routers/achats.py
new file mode 100644
index 0000000..716d8a2
--- /dev/null
+++ b/backend/app/routers/achats.py
@@ -0,0 +1,60 @@
+# backend/app/routers/achats.py
+from typing import List, Optional
+from fastapi import APIRouter, Depends, HTTPException, Query, status
+from sqlmodel import Session, select
+from app.database import get_session
+from app.models.intrant import AchatIntrant
+
+router = APIRouter(tags=["intrants"])
+
+
+@router.get("/achats", response_model=List[AchatIntrant])
+def list_achats(
+    categorie: Optional[str] = Query(None),
+    jardin_id: Optional[int] = Query(None),
+    session: Session = Depends(get_session),
+):
+    q = select(AchatIntrant)
+    if categorie:
+        q = q.where(AchatIntrant.categorie == categorie)
+    if jardin_id:
+        q = q.where(AchatIntrant.jardin_id == jardin_id)
+    return session.exec(q.order_by(AchatIntrant.created_at.desc())).all()
+
+
+@router.post("/achats", response_model=AchatIntrant, status_code=status.HTTP_201_CREATED)
+def create_achat(a: AchatIntrant, session: Session = Depends(get_session)):
+    session.add(a)
+    session.commit()
+    session.refresh(a)
+    return a
+
+
+@router.get("/achats/{id}", response_model=AchatIntrant)
+def get_achat(id: int, session: Session = Depends(get_session)):
+    a = session.get(AchatIntrant, id)
+    if not a:
+        raise HTTPException(404, "Achat introuvable")
+    return a
+
+
+@router.put("/achats/{id}", response_model=AchatIntrant)
+def update_achat(id: int, data: AchatIntrant, session: Session = Depends(get_session)):
+    a = session.get(AchatIntrant, id)
+    if not a:
+        raise HTTPException(404, "Achat introuvable")
+    for k, v in data.model_dump(exclude_unset=True, exclude={"id", "created_at"}).items():
+        setattr(a, k, v)
+    session.add(a)
+    session.commit()
+    session.refresh(a)
+    return a
+
+
+@router.delete("/achats/{id}", status_code=status.HTTP_204_NO_CONTENT)
+def delete_achat(id: int, session: Session = Depends(get_session)):
+    a = session.get(AchatIntrant, id)
+    if not a:
+        raise HTTPException(404, "Achat introuvable")
+    session.delete(a)
+    session.commit()