diff --git a/app/main.py b/app/main.py
index 18fcd45..8ec950c 100644
--- a/app/main.py
+++ b/app/main.py
@@ -1,4 +1,11 @@
 from fastapi import FastAPI, __version__
+from pydantic import BaseModel
+from typing import Set, List, Optional, Dict
+from random import randint
+
+from models.solver_run import SolverRun
+from models.solution import Solution
+from models.form import Form
 
 app = FastAPI()
 
@@ -13,10 +20,20 @@ async def health():
     "git_repo": "https://github.com/yardstick/measure-solver",
     "server": "OK",
     "fastapi version": __version__,
-    "app version": "0.1.0"
+    "app version": "0.1.1"
   }
   return content
 
 @app.get('/readycheck')
 async def ready():
   return 'OK'  # just means we're on air
+
+@app.post('/solve/')
+async def solve(solver_run: SolverRun):
+  response = Solution(
+    response_id=randint(100,5000),
+    forms=[Form(
+      items=[item.id for item in solver_run.items]
+    )]
+  )
+  return response
diff --git a/app/models/advanced_options.py b/app/models/advanced_options.py
new file mode 100644
index 0000000..1a9fb34
--- /dev/null
+++ b/app/models/advanced_options.py
@@ -0,0 +1,11 @@
+from pydantic import BaseModel
+from typing import List, Optional, Dict
+
+class AdvancedOptions(BaseModel):
+  linearity_check: bool
+  show_progress: bool
+  max_solution_time: Optional[int]
+  brand_bound_tolerance: Optional[float]
+  max_forms: Optional[int]
+  precision: Optional[float]
+  extra_param_range: Optional[List[Dict]]
diff --git a/app/models/attribute.py b/app/models/attribute.py
new file mode 100644
index 0000000..0219ea6
--- /dev/null
+++ b/app/models/attribute.py
@@ -0,0 +1,7 @@
+from pydantic import BaseModel
+from typing import Optional
+
+class Attribute(BaseModel):
+  value: str
+  type: Optional[str]
+  id: str
diff --git a/app/models/constraint.py b/app/models/constraint.py
new file mode 100644
index 0000000..84eb1b2
--- /dev/null
+++ b/app/models/constraint.py
@@ -0,0 +1,9 @@
+from pydantic import BaseModel
+from typing import Optional
+
+from models.attribute import Attribute
+
+class Constraint(BaseModel):
+  reference_attribute: Attribute
+  minimum: int
+  maximum: int
diff --git a/app/models/form.py b/app/models/form.py
new file mode 100644
index 0000000..5ff5414
--- /dev/null
+++ b/app/models/form.py
@@ -0,0 +1,7 @@
+from pydantic import BaseModel
+from typing import List
+
+from models.item import Item
+
+class Form(BaseModel):
+  items: List[int]
diff --git a/app/models/irt_model.py b/app/models/irt_model.py
new file mode 100644
index 0000000..4751ba9
--- /dev/null
+++ b/app/models/irt_model.py
@@ -0,0 +1,7 @@
+from pydantic import BaseModel
+
+class IRTModel(BaseModel):
+  a_param: float
+  b_param: float
+  c_param: float
+  model: str
diff --git a/app/models/item.py b/app/models/item.py
new file mode 100644
index 0000000..975593e
--- /dev/null
+++ b/app/models/item.py
@@ -0,0 +1,8 @@
+from pydantic import BaseModel
+from typing import List
+
+from models.attribute import Attribute
+
+class Item(BaseModel):
+  id: int
+  attributes: List[Attribute]
diff --git a/app/models/objective_function.py b/app/models/objective_function.py
new file mode 100644
index 0000000..0c7835d
--- /dev/null
+++ b/app/models/objective_function.py
@@ -0,0 +1,13 @@
+from pydantic import BaseModel
+from typing import Dict, List
+
+from models.target import Target
+
+class ObjectiveFunction(BaseModel):
+  # minimizing tif/tcc target value is only option currently
+  # as we add more we can build this out to be more dynamic
+  # likely with models representing each objective function type
+  tif_targets: List[Target]
+  tcc_targets: List[Target]
+  objective: "minimize"
+  weight: Dict = {'tif': 1, 'tcc': 1}
diff --git a/app/models/solution.py b/app/models/solution.py
new file mode 100644
index 0000000..d895574
--- /dev/null
+++ b/app/models/solution.py
@@ -0,0 +1,8 @@
+from pydantic import BaseModel
+from typing import List
+
+from models.form import Form
+
+class Solution(BaseModel):
+  response_id: int
+  forms: List[Form]
diff --git a/app/models/solver_run.py b/app/models/solver_run.py
new file mode 100644
index 0000000..5dea7f0
--- /dev/null
+++ b/app/models/solver_run.py
@@ -0,0 +1,17 @@
+from pydantic import BaseModel
+from typing import List, Optional
+
+from models.item import Item
+from models.constraint import Constraint
+from models.irt_model import IRTModel
+from models.objective_function import ObjectiveFunction
+from models.advanced_options import AdvancedOptions
+
+class SolverRun(BaseModel):
+  items: List[Item]
+  constraints: List[Constraint]
+  irt_model: IRTModel
+  objective_fuction: ObjectiveFunction
+  total_form_items: int
+  advanced_options: Optional[AdvancedOptions]
+  engine: str
diff --git a/app/models/target.py b/app/models/target.py
new file mode 100644
index 0000000..1383208
--- /dev/null
+++ b/app/models/target.py
@@ -0,0 +1,5 @@
+from pydantic import BaseModel
+
+class Target(BaseModel):
+  theta: float
+  value: float