diff --git a/CHANGELOG.md b/CHANGELOG.md
index 93266a68f..ebbdbdc59 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,7 @@
 
 - fix: vector package should return generic type in computations [#628](https://github.com/hypermodeinc/modus/pull/628)
 - chore: Delete extraneous copy of Anthropic model interface [#631](https://github.com/hypermodeinc/modus/pull/631)
+- feat: Add `DynamicMap` type [#638](https://github.com/hypermodeinc/modus/pull/638)
 
 ## 2024-11-27 - CLI 0.14.0
 
diff --git a/cspell.json b/cspell.json
index e5481db0f..7125a49aa 100644
--- a/cspell.json
+++ b/cspell.json
@@ -40,6 +40,7 @@
     "dotproduct",
     "dsname",
     "dspc",
+    "dynamicmap",
     "embedder",
     "embedders",
     "envfiles",
diff --git a/sdk/assemblyscript/src/assembly/__tests__/dynamicmap.spec.ts b/sdk/assemblyscript/src/assembly/__tests__/dynamicmap.spec.ts
new file mode 100644
index 000000000..820a3a033
--- /dev/null
+++ b/sdk/assemblyscript/src/assembly/__tests__/dynamicmap.spec.ts
@@ -0,0 +1,116 @@
+/*
+ * Copyright 2024 Hypermode Inc.
+ * Licensed under the terms of the Apache License, Version 2.0
+ * See the LICENSE file that accompanied this code for further details.
+ *
+ * SPDX-FileCopyrightText: 2024 Hypermode Inc. <hello@hypermode.com>
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { JSON } from "json-as";
+import { expect, it, run } from "as-test";
+import { DynamicMap } from "../dynamicmap";
+
+
+@json
+class Obj {
+  foo: string = "";
+}
+
+it("should set values", () => {
+  const m = new DynamicMap();
+  m.set("a", 42);
+  m.set("b", "hello");
+  m.set("c", [1, 2, 3]);
+  m.set("d", true);
+  m.set("e", null);
+  m.set("f", 3.14);
+  m.set("g", { foo: "bar" } as Obj);
+
+  const json = JSON.stringify(m);
+  expect(json).toBe(
+    '{"a":42,"b":"hello","c":[1,2,3],"d":true,"e":null,"f":3.14,"g":{"foo":"bar"}}',
+  );
+});
+
+it("should get values", () => {
+  const m = JSON.parse<DynamicMap>(
+    '{"a":42,"b":"hello","c":[1,2,3],"d":true,"e":null,"f":3.14,"g":{"foo":"bar"}}',
+  );
+  expect(m.get<i32>("a")).toBe(42);
+  expect(m.get<string>("b")).toBe("hello");
+  expect(m.get<i32[]>("c")).toBe([1, 2, 3]);
+  expect(m.get<bool>("d")).toBe(true);
+  expect(m.get<Obj | null>("e")).toBe(null);
+  expect(m.get<f64>("f")).toBe(3.14);
+
+  const obj = m.get<Obj>("g");
+  expect(obj.foo).toBe("bar");
+});
+
+it("should get size", () => {
+  const m = new DynamicMap();
+  expect(m.size).toBe(0);
+  m.set("a", 42);
+  expect(m.size).toBe(1);
+  m.set("b", "hello");
+  expect(m.size).toBe(2);
+});
+
+it("should test existence of keys", () => {
+  const m = new DynamicMap();
+  expect(m.has("a")).toBe(false);
+  m.set("a", 42);
+  expect(m.has("a")).toBe(true);
+  expect(m.has("b")).toBe(false);
+  m.set("b", "hello");
+  expect(m.has("b")).toBe(true);
+});
+
+it("should delete keys", () => {
+  const m = new DynamicMap();
+  m.set("a", 42);
+  m.set("b", "hello");
+  expect(m.size).toBe(2);
+  expect(m.has("a")).toBe(true);
+  expect(m.has("b")).toBe(true);
+  m.delete("a");
+  expect(m.size).toBe(1);
+  expect(m.has("a")).toBe(false);
+  expect(m.has("b")).toBe(true);
+  m.delete("b");
+  expect(m.size).toBe(0);
+  expect(m.has("a")).toBe(false);
+  expect(m.has("b")).toBe(false);
+});
+
+it("should clear", () => {
+  const m = new DynamicMap();
+  m.set("a", 42);
+  m.set("b", "hello");
+  expect(m.size).toBe(2);
+  m.clear();
+  expect(m.size).toBe(0);
+  expect(m.has("a")).toBe(false);
+  expect(m.has("b")).toBe(false);
+});
+
+it("should iterate keys", () => {
+  const m = new DynamicMap();
+  m.set("a", 42);
+  m.set("b", "hello");
+  m.set("c", [1, 2, 3]);
+  const keys = m.keys();
+  expect(keys).toBe(["a", "b", "c"]);
+});
+
+it("should iterate raw values", () => {
+  const m = new DynamicMap();
+  m.set("a", 42);
+  m.set("b", "hello");
+  m.set("c", [1, 2, 3]);
+  const values = m.values();
+  expect(values).toBe(["42", '"hello"', "[1,2,3]"]);
+});
+
+run();
diff --git a/sdk/assemblyscript/src/assembly/dynamicmap.ts b/sdk/assemblyscript/src/assembly/dynamicmap.ts
new file mode 100644
index 000000000..794fdae86
--- /dev/null
+++ b/sdk/assemblyscript/src/assembly/dynamicmap.ts
@@ -0,0 +1,217 @@
+/*
+ * Copyright 2024 Hypermode Inc.
+ * Licensed under the terms of the Apache License, Version 2.0
+ * See the LICENSE file that accompanied this code for further details.
+ *
+ * SPDX-FileCopyrightText: 2024 Hypermode Inc. <hello@hypermode.com>
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { JSON } from "json-as";
+
+export class DynamicMap {
+  private data: Map<string, JSON.Raw> = new Map<string, JSON.Raw>();
+
+  public get size(): i32 {
+    return this.data.size;
+  }
+
+  public has(key: string): bool {
+    return this.data.has(key);
+  }
+
+  public get<T>(key: string): T {
+    return JSON.parse<T>(this.data.get(key));
+  }
+
+  public set<T>(key: string, value: T): void {
+    if (value == null) {
+      this.data.set(key, "null");
+    } else {
+      this.data.set(key, JSON.stringify(value));
+    }
+  }
+
+  public delete(key: string): bool {
+    return this.data.delete(key);
+  }
+
+  public clear(): void {
+    this.data.clear();
+  }
+
+  public keys(): string[] {
+    return this.data.keys();
+  }
+
+  public values(): JSON.Raw[] {
+    return this.data.values();
+  }
+
+  __INITIALIZE(): this {
+    return this;
+  }
+
+  __SERIALIZE(): string {
+    // This would be ideal, but doesn't work:
+    //   return JSON.stringify(this.data);
+    // So instead, we have to do construct the JSON manually.
+    //
+    // TODO: Update this to use JSON.stringify once it's supported in json-as.
+    // https://github.com/JairusSW/as-json/issues/98
+
+    const segments: string[] = [];
+    const keys = this.data.keys();
+    const values = this.data.values();
+
+    for (let i = 0; i < this.data.size; i++) {
+      const key = JSON.stringify(keys[i]);
+      const value = values[i]; // already in JSON
+      segments.push(`${key}:${value}`);
+    }
+
+    return `{${segments.join(",")}}`;
+  }
+
+  /* eslint-disable @typescript-eslint/no-unused-vars */
+  __DESERIALIZE(
+    data: string,
+    key_start: i32,
+    key_end: i32,
+    value_start: i32,
+    value_end: i32,
+  ): boolean {
+    // This would be ideal, but doesn't work:
+    //   this.data = JSON.parse<Map<string, JSON.Raw>>(data);
+    // So instead, we have to parse the JSON manually.
+    //
+    // TODO: Update this to use JSON.parse once it's supported in json-as.
+    // https://github.com/JairusSW/as-json/issues/98
+
+    this.data = parseJsonToRawMap(data);
+
+    return true;
+  }
+}
+
+// Everything below this line is a workaround for JSON.parse not working with JSON.Raw values.
+// (It was generated via AI and may not be optimized.)
+
+class ParseResult {
+  constructor(
+    public result: string,
+    public nextIndex: i32,
+  ) {}
+}
+
+function parseJsonToRawMap(jsonString: string): Map<string, string> {
+  const map = new Map<string, string>();
+  let i: i32 = 0;
+  const length: i32 = jsonString.length;
+
+  function skipWhitespace(index: i32, input: string): i32 {
+    while (
+      index < input.length &&
+      (input.charCodeAt(index) === 32 || // space
+        input.charCodeAt(index) === 9 || // tab
+        input.charCodeAt(index) === 10 || // newline
+        input.charCodeAt(index) === 13) // carriage return
+    ) {
+      index++;
+    }
+    return index;
+  }
+
+  function readString(index: i32, input: string): ParseResult {
+    if (input.charCodeAt(index) !== 34) {
+      throw new Error("Expected '\"' at position " + index.toString());
+    }
+    index++;
+    let result = "";
+    while (index < input.length) {
+      const charCode = input.charCodeAt(index);
+      if (charCode === 34) {
+        return new ParseResult(result, index + 1);
+      }
+      if (charCode === 92) {
+        index++;
+        if (index < input.length) {
+          result += String.fromCharCode(input.charCodeAt(index));
+        }
+      } else {
+        result += String.fromCharCode(charCode);
+      }
+      index++;
+    }
+    throw new Error("Unterminated string");
+  }
+
+  function readValue(index: i32, input: string): ParseResult {
+    const start: i32 = index;
+    let braceCount: i32 = 0;
+    let bracketCount: i32 = 0;
+
+    while (index < input.length) {
+      const char = input.charAt(index);
+      if (
+        braceCount === 0 &&
+        bracketCount === 0 &&
+        (char === "," || char === "}")
+      ) {
+        break;
+      }
+      if (char === "{") braceCount++;
+      else if (char === "}") braceCount--;
+      else if (char === "[") bracketCount++;
+      else if (char === "]") bracketCount--;
+      index++;
+    }
+
+    const result = input.substring(start, index).trim();
+    return new ParseResult(result, index);
+  }
+
+  if (jsonString.charCodeAt(i) !== 123) {
+    throw new Error("Expected '{' at the beginning of JSON");
+  }
+  i++;
+
+  while (i < length) {
+    i = skipWhitespace(i, jsonString);
+
+    const keyResult = readString(i, jsonString);
+    const key = keyResult.result;
+    i = keyResult.nextIndex;
+
+    i = skipWhitespace(i, jsonString);
+    if (jsonString.charCodeAt(i) !== 58) {
+      throw new Error("Expected ':' after key at position " + i.toString());
+    }
+    i++;
+
+    i = skipWhitespace(i, jsonString);
+
+    const valueResult = readValue(i, jsonString);
+    const value = valueResult.result;
+    i = valueResult.nextIndex;
+
+    map.set(key, value);
+
+    i = skipWhitespace(i, jsonString);
+    if (jsonString.charCodeAt(i) === 44) {
+      i++;
+    } else if (jsonString.charCodeAt(i) === 125) {
+      i++;
+      break;
+    } else {
+      throw new Error(
+        "Unexpected character '" +
+          jsonString.charAt(i) +
+          "' at position " +
+          i.toString(),
+      );
+    }
+  }
+
+  return map;
+}
diff --git a/sdk/assemblyscript/src/assembly/index.ts b/sdk/assemblyscript/src/assembly/index.ts
index 6d7e636e8..add6f6d52 100644
--- a/sdk/assemblyscript/src/assembly/index.ts
+++ b/sdk/assemblyscript/src/assembly/index.ts
@@ -30,3 +30,8 @@ export { vectors };
 
 import * as auth from "./auth";
 export { auth };
+
+import * as utils from "./utils";
+export { utils };
+
+export * from "./dynamicmap";
diff --git a/sdk/assemblyscript/src/tests/dynamicmap.run.ts b/sdk/assemblyscript/src/tests/dynamicmap.run.ts
new file mode 100644
index 000000000..10f6c4fe4
--- /dev/null
+++ b/sdk/assemblyscript/src/tests/dynamicmap.run.ts
@@ -0,0 +1,16 @@
+/*
+ * Copyright 2024 Hypermode Inc.
+ * Licensed under the terms of the Apache License, Version 2.0
+ * See the LICENSE file that accompanied this code for further details.
+ *
+ * SPDX-FileCopyrightText: 2024 Hypermode Inc. <hello@hypermode.com>
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { readFileSync } from "fs";
+import { instantiate } from "../build/dynamicmap.spec.js";
+const binary = readFileSync("./build/dynamicmap.spec.wasm");
+const module = new WebAssembly.Module(binary);
+instantiate(module, {
+  env: {},
+});