diff --git a/epapi/v1/endpoints/additional_information.py b/epapi/v1/endpoints/additional_information.py
index 47b169f9..c5cb9124 100644
--- a/epapi/v1/endpoints/additional_information.py
+++ b/epapi/v1/endpoints/additional_information.py
@@ -9,8 +9,8 @@ from envipy_additional_information import registry
 from envipy_additional_information.groups import GroupEnum
 from epapi.utils.schema_transformers import build_rjsf_output
 from epapi.utils.validation_errors import handle_validation_error
-from epdb.models import AdditionalInformation
-from ..dal import get_scenario_for_read, get_scenario_for_write
+from epdb.models import AdditionalInformation, Scenario, Node
+from ..dal import get_scenario_for_read, get_scenario_for_write, get_package_for_write
 
 logger = logging.getLogger(__name__)
 
@@ -58,6 +58,61 @@ def list_scenario_info(request, scenario_uuid: UUID):
     return result
 
 
+@router.post("/information/{model_name}/")
+def add_object_info(request, model_name: str, payload: Dict[str, Any] = Body(...)):
+    from epdb.views import EPDBURLParser
+
+    cls = registry.get_model(model_name.lower())
+    if not cls:
+        raise HttpError(404, f"Unknown model: {model_name}")
+
+    try:
+        instance = cls(**payload)  # Pydantic validates
+    except ValidationError as e:
+        handle_validation_error(e)
+
+    if "attach_obj_url" in payload:
+        url_parser = EPDBURLParser(payload["attach_obj_url"])
+
+        if url_parser.contains_package_url():
+            package = get_package_for_write(request.user, url_parser.get_objects()[0].uuid)
+            attach_obj = url_parser.get_object()
+
+            if "scenario_uuid" in payload:
+                scenario = get_scenario_for_read(request.user, payload["scenario_uuid"])
+            else:
+                scenario = Scenario.create(
+                    package,
+                    name=f"Scenario {Scenario.objects.filter(package=package).count() + 1}",
+                    description="no description",
+                    scenario_date=None,
+                    scenario_type=None,
+                    additional_information=[],
+                )
+
+            if isinstance(attach_obj, Node):
+                ai = add_info_to_node(package, instance, scenario, attach_obj)
+            else:
+                raise HttpError(404, f"Bad request - Not implemented for {type(attach_obj)}!")
+
+            return {"status": "created", "uuid": ai.uuid}
+
+    raise HttpError(404, "Bad request!")
+
+
+def add_info_to_node(package, add_inf, scenario, node):
+    ai = AdditionalInformation.create(
+        package,
+        add_inf,
+        scenario=scenario,
+        content_object=node,
+    )
+
+    node.pathway.scenarios.add(scenario)
+
+    return ai
+
+
 @router.post("/scenario/{uuid:scenario_uuid}/information/{model_name}/")
 def add_scenario_info(
     request, scenario_uuid: UUID, model_name: str, payload: Dict[str, Any] = Body(...)
diff --git a/epdb/legacy_api.py b/epdb/legacy_api.py
index 0936ee10..a6f58ef2 100644
--- a/epdb/legacy_api.py
+++ b/epdb/legacy_api.py
@@ -1620,7 +1620,7 @@ class PathwayNode(Schema):
     image: str = Field(None, alias="image")
     imageSize: int = Field(None, alias="image_size")
     name: str = Field(None, alias="name")
-    proposed: List[Dict[str, str]] = []
+    proposed: List[Dict[str, Any]] = []
     smiles: str = Field(None, alias="smiles")
     pseudo: bool = Field(False, alias="pseudo")
 
diff --git a/epdb/models.py b/epdb/models.py
index 04387347..947acf28 100644
--- a/epdb/models.py
+++ b/epdb/models.py
@@ -2455,7 +2455,7 @@ class Node(EnviPathModel, AliasMixin, ScenarioMixin, AdditionalInformationMixin)
             "name": self.get_name(),
             "plain_name": self.get_name(include_suffix=False),
             "smiles": self.default_node_label.smiles,
-            "scenarios": [{"name": s.get_name(), "url": s.url} for s in self.scenarios.all()],
+            "scenarios": [{"name": s.get_name(), "url": s.url} for s in self.get_scenarios()],
             "app_domain": {
                 "inside_app_domain": app_domain_data["assessment"]["inside_app_domain"]
                 if app_domain_data
@@ -2583,6 +2583,15 @@ class Node(EnviPathModel, AliasMixin, ScenarioMixin, AdditionalInformationMixin)
 
         return list(collected.values())
 
+    def get_scenarios(self):
+        qs = self.scenarios.all()
+        qs |= Scenario.objects.filter(
+            id__in=self.additional_information.filter(scenario__isnull=False)
+            .values_list("scenario", flat=True)
+            .distinct()
+        )
+        return qs.distinct()
+
 
 class Edge(EnviPathModel, AliasMixin, ScenarioMixin, AdditionalInformationMixin):
     pathway = models.ForeignKey(
diff --git a/static/js/api/additional-information.js b/static/js/api/additional-information.js
index 616a3cc6..858720d8 100644
--- a/static/js/api/additional-information.js
+++ b/static/js/api/additional-information.js
@@ -186,6 +186,40 @@ window.AdditionalInformationApi = {
     return this._handleResponse(response, "createItem");
   },
 
+    /**
+   * Create new additional information and attach it to an object.
+
+   * @param {string} modelName - Name/type of the additional information model
+   * @param {Object} data - Data for the new item
+   * @param {string} attachObjectUrl - UUID of the object this data should be attached to
+   * @param {string} scenarioUuid - UUID of the scenario
+   * @returns {Promise<{status: string, uuid: string}>}
+   */
+  async createItemOnNonScenarioObject(modelName, data, attachObjectUrl, scenarioUuid) {
+    const sanitizedData = this.sanitizePayload(data);
+    this._log("createItemOnNonScenarioObject", { modelName, data: sanitizedData, attachObjectUrl, scenarioUuid });
+
+    sanitizedData.attach_obj_url = attachObjectUrl;
+    if (scenarioUuid) {
+      sanitizedData.scenario_uuid = scenarioUuid;
+    }
+
+
+    // Normalize model name to lowercase
+    const normalizedName = modelName.toLowerCase();
+
+    const response = await fetch(
+      `/api/v1/information/${normalizedName}/`,
+      {
+        method: "POST",
+        headers: this._buildHeaders(),
+        body: JSON.stringify(sanitizedData),
+      },
+    );
+
+    return this._handleResponse(response, "createItemOnNonScenarioObject");
+  },
+
   /**
    * Delete additional information from a scenario
    * @param {string} scenarioUuid - UUID of the scenario
diff --git a/templates/actions/objects/pathway.html b/templates/actions/objects/pathway.html
index 91c861d6..a30a7284 100644
--- a/templates/actions/objects/pathway.html
+++ b/templates/actions/objects/pathway.html
@@ -83,6 +83,19 @@
       <i class="glyphicon glyphicon-edit"></i> Edit Pathway</a
     >
   </li>
+  <li>
+    <a
+      class="button"
+      onclick="
+      const modal = document.getElementById('edit_pathway_node_modal');
+      modal.showModal();
+      window.dispatchEvent(new Event('modal-opened'));
+      return false;
+      "
+    >
+      <i class="glyphicon glyphicon-edit"></i> Edit Compound</a
+    >
+  </li>
   <li>
     <a
       role="button"
diff --git a/templates/actions/objects/scenario.html b/templates/actions/objects/scenario.html
index ce38ba5d..4cff973f 100644
--- a/templates/actions/objects/scenario.html
+++ b/templates/actions/objects/scenario.html
@@ -10,7 +10,7 @@
   <li>
     <a
       class="button"
-      onclick="document.getElementById('add_additional_information_modal').showModal(); return false;"
+      onclick="document.getElementById('add_scenario_additional_information_modal').showModal(); return false;"
     >
       <i class="glyphicon glyphicon-trash"></i> Add Additional Information</a
     >
diff --git a/templates/modals/objects/add_additional_information_modal.html b/templates/modals/objects/add_scenario_additional_information_modal.html
similarity index 98%
rename from templates/modals/objects/add_additional_information_modal.html
rename to templates/modals/objects/add_scenario_additional_information_modal.html
index 3246c8c0..a93faea9 100644
--- a/templates/modals/objects/add_additional_information_modal.html
+++ b/templates/modals/objects/add_scenario_additional_information_modal.html
@@ -1,7 +1,7 @@
 {% load static %}
 <!-- Add Additional Information -->
 <dialog
-  id="add_additional_information_modal"
+  id="add_scenario_additional_information_modal"
   class="modal"
   x-data="{
     isSubmitting: false,
@@ -98,7 +98,7 @@
         );
 
         // Close modal and reload page to show new item
-        document.getElementById('add_additional_information_modal').close();
+        document.getElementById('add_scenario_additional_information_modal').close();
         window.location.reload();
       } catch (err) {
         if (err.isValidationError && err.fieldErrors) {
diff --git a/templates/modals/objects/edit_pathway_node_modal.html b/templates/modals/objects/edit_pathway_node_modal.html
new file mode 100644
index 00000000..976a304c
--- /dev/null
+++ b/templates/modals/objects/edit_pathway_node_modal.html
@@ -0,0 +1,276 @@
+{% load static %}
+<!-- Add Additional Information -->
+<dialog
+  id="edit_pathway_node_modal"
+  class="modal"
+  x-data="{
+    isSubmitting: false,
+    selectedType: '',
+    selectedScenario: '',
+    selectedNode: '',
+    schemas: {},
+    loadingSchemas: false,
+    error: null,
+    formData: null,  // Store reference to form data
+    formRenderKey: 0,  // Counter to force form re-render
+    allowedTypes: ['halflife', 'halflifews', 'proposedintermediate', 'transformationproductimportance', 'confidence'],
+    scenarios: [],
+    scenariosLoaded: false,
+
+    // Get sorted unique schema names for dropdown, excluding already-added types
+    get sortedSchemaNames() {
+      const names = Object.keys(this.schemas);
+      // Remove duplicates, exclude existing types, and sort alphabetically by display title
+      const unique = [...new Set(names)];
+      const available = unique.filter(name =>
+        this.allowedTypes.includes(name)
+      );
+      return available.sort((a, b) => {
+        const titleA = (this.schemas[a]?.schema?.['x-title'] || a).toLowerCase();
+        const titleB = (this.schemas[b]?.schema?.['x-title'] || b).toLowerCase();
+        return titleA.localeCompare(titleB);
+      });
+    },
+
+    async init() {
+      // Watch for selectedType changes
+      this.$watch('selectedType', (value) => {
+        // Reset formData when type changes and increment key to force re-render
+        this.formData = null;
+        this.formRenderKey++;
+        // Clear previous errors
+        this.error = null;
+        Alpine.store('validationErrors').clearErrors(); // No context - clears all
+      });
+
+      // Load schemas and existing items
+      try {
+        this.loadingSchemas = true;
+        const [schemasRes, scenarioRes] = await Promise.all([
+          fetch('/api/v1/information/schema/'),
+          fetch('{% url "package scenario list" meta.current_package.uuid %}', { headers: {'Accept': 'application/json' }}),
+        ]);
+
+        if (!schemasRes.ok) throw new Error('Failed to load schemas');
+        if (!scenarioRes.ok) throw new Error('Failed to load scenarios');
+
+        this.schemas = await schemasRes.json();
+        this.scenarios = await scenarioRes.json();
+        // Get unique existing types (normalize to lowercase)
+      } catch (err) {
+        this.error = err.message;
+      } finally {
+        this.loadingSchemas = false;
+      }
+    },
+
+    reset() {
+      this.isSubmitting = false;
+      this.selectedType = '';
+      this.error = null;
+      this.formData = null;
+      this.selectedScenario = '';
+      Alpine.store('validationErrors').clearErrors(); // No context - clears all
+    },
+
+    setFormData(data) {
+      // Fired from schemaRenderer
+      this.formData = data;
+    },
+
+    async submit() {
+      if (!this.selectedType) return;
+      const payload = window.AdditionalInformationApi.sanitizePayload(this.formData || {});
+
+      // Validate that form has data
+      if (!payload || Object.keys(payload).length === 0) {
+        // proposedintermediate is parameterless
+        if (!this.selectedType === 'proposedintermediate') {
+          this.error = 'Please fill in at least one field';
+          return;
+        }
+      }
+
+      this.isSubmitting = true;
+      this.error = null;
+
+      try {
+      // TODO
+        await window.AdditionalInformationApi.createItemOnNonScenarioObject(
+          this.selectedType,
+          payload,
+          this.selectedNode,
+          this.selectedScenario
+        );
+
+        // Close modal and reload page to show new item
+        document.getElementById('edit_pathway_node_modal').close();
+        window.location.reload();
+      } catch (err) {
+        if (err.isValidationError && err.fieldErrors) {
+          // No context for add modal - simple flat errors
+          Alpine.store('validationErrors').setErrors(err.fieldErrors);
+          this.error = err.message || 'Please correct the errors in the form';
+        } else {
+          this.error = err.message || 'An error occurred. Please try again.';
+        }
+      } finally {
+        this.isSubmitting = false;
+      }
+    }
+  }"
+  @close="reset()"
+  @form-data-ready="setFormData($event.detail)"
+  @modal-opened.window="
+   const el = d3.select('circle.highlighted').node();
+   if (el !== null) {
+    const selectElement = document.getElementById('edit_pathway_nodes_node');
+    for (let option of selectElement.options) {
+        if (option.value === el.__data__.url) {
+            option.selected = true;
+            break;
+        }
+    }
+    selectElement.dispatchEvent(new Event('change'));
+   }
+  "
+>
+  <div class="modal-box max-w-2xl">
+    <!-- Header -->
+    <h3 class="text-lg font-bold">Edit Compound</h3>
+
+    <!-- Close button (X) -->
+    <form method="dialog">
+      <button
+        class="btn btn-sm btn-circle btn-ghost absolute top-2 right-2"
+        :disabled="isSubmitting"
+      >
+        ✕
+      </button>
+    </form>
+
+    <!-- Body -->
+    <div class="py-4">
+      <!-- Loading state -->
+      <template x-if="loadingSchemas">
+        <div class="flex items-center justify-center p-4">
+          <span class="loading loading-spinner loading-md"></span>
+        </div>
+      </template>
+
+      <!-- Error state -->
+      <template x-if="error">
+        <div class="alert alert-error mb-4">
+          <span x-text="error"></span>
+        </div>
+      </template>
+      <div class="form-control">
+        <p>
+          If no Scenario is selected a new Scenario will be created and attached
+          to this Pathway
+        </p>
+        <label class="label" for="edit_pathway_nodes_node">
+          <span class="label-text">Select Node</span>
+        </label>
+        <select
+          id="edit_pathway_nodes_node"
+          name="node"
+          class="select select-bordered w-full"
+          x-model="selectedNode"
+        >
+          {% for n in pathway.nodes %}
+            <option value="{{ n.url }}">
+              {{ n.default_node_label.name|safe }}
+            </option>
+          {% endfor %}
+        </select>
+
+        <label class="label" for="scenario-select">
+          <span class="label-text">Scenarios</span>
+        </label>
+        <select
+          id="scenario-select"
+          name="selected-scenarios"
+          class="select select-bordered w-full"
+          x-model="selectedScenario"
+        >
+          <option value="" selected disabled>Select Scenario</option>
+          <template x-for="scenario in scenarios" :key="scenario.url">
+            <option :value="scenario.url" x-text="scenario.name"></option>
+          </template>
+        </select>
+      </div>
+
+      <!-- Schema selection -->
+      <template x-if="!loadingSchemas">
+        <div>
+          <div class="form-control mb-4">
+            <label class="label" for="select-additional-information-type">
+              <span class="label-text">Select the type to add</span>
+            </label>
+            <select
+              id="select-additional-information-type"
+              class="select select-bordered w-full"
+              x-model="selectedType"
+            >
+              <option value="" selected disabled>Select the type to add</option>
+              <template x-for="name in sortedSchemaNames" :key="name">
+                <option
+                  :value="name"
+                  x-text="(schemas[name].schema && (schemas[name].schema['x-title'] || schemas[name].schema.title)) || name"
+                ></option>
+              </template>
+            </select>
+          </div>
+
+          <!-- Form renderer for selected type -->
+          <!-- Use unique key per type to force re-render -->
+          <template x-for="renderKey in [formRenderKey]" :key="renderKey">
+            <div x-show="selectedType && schemas[selectedType]">
+              <div
+                x-data="schemaRenderer({
+                  rjsf: schemas[selectedType],
+                  mode: 'edit'
+                  // No context - single form, backward compatible
+                })"
+                x-init="await init(); $dispatch('form-data-ready', data)"
+              >
+                {% include "components/schema_form.html" %}
+              </div>
+            </div>
+          </template>
+        </div>
+      </template>
+    </div>
+
+    <!-- Footer -->
+    <div class="modal-action">
+      <button
+        type="button"
+        class="btn"
+        onclick="this.closest('dialog').close()"
+        :disabled="isSubmitting"
+      >
+        Close
+      </button>
+      <button
+        type="button"
+        class="btn btn-primary"
+        @click="submit()"
+        :disabled="isSubmitting || loadingSchemas || !selectedType || !selectedNode"
+      >
+        <span x-show="!isSubmitting">Add</span>
+        <span
+          x-show="isSubmitting"
+          class="loading loading-spinner loading-sm"
+        ></span>
+        <span x-show="isSubmitting">Adding...</span>
+      </button>
+    </div>
+  </div>
+
+  <!-- Backdrop -->
+  <form method="dialog" class="modal-backdrop">
+    <button :disabled="isSubmitting">close</button>
+  </form>
+</dialog>
diff --git a/templates/objects/pathway.html b/templates/objects/pathway.html
index 2ec30a49..398e4882 100644
--- a/templates/objects/pathway.html
+++ b/templates/objects/pathway.html
@@ -4,6 +4,8 @@
 
 {% block content %}
   <script src="https://d3js.org/d3.v7.min.js"></script>
+  <script src="{% static 'js/api/additional-information.js' %}"></script>
+
   <style>
     #vizdiv {
       width: 100%;
@@ -97,6 +99,7 @@
     {% include "modals/objects/identify_missing_rules_modal.html" %}
     {% include "modals/objects/generic_copy_object_modal.html" %}
     {% include "modals/objects/edit_pathway_modal.html" %}
+    {% include "modals/objects/edit_pathway_node_modal.html" %}
     {% include "modals/objects/generic_set_aliases_modal.html" %}
     {% include "modals/objects/generic_set_scenario_modal.html" %}
     {% include "modals/objects/delete_pathway_node_modal.html" %}
diff --git a/templates/objects/scenario.html b/templates/objects/scenario.html
index f723cfe0..ce1d8e1f 100644
--- a/templates/objects/scenario.html
+++ b/templates/objects/scenario.html
@@ -7,7 +7,7 @@
 
   {% block action_modals %}
     {% include "modals/objects/edit_scenario_modal.html" %}
-    {% include "modals/objects/add_additional_information_modal.html" %}
+    {% include "modals/objects/add_scenario_additional_information_modal.html" %}
     {% include "modals/objects/update_scenario_additional_information_modal.html" %}
     {% include "modals/objects/generic_delete_modal.html" %}
   {% endblock action_modals %}