diff --git a/.vscode/launch.json b/.vscode/launch.json
index 0acc9101..73ffa482 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -8,10 +8,11 @@
       "type": "node",
       "request": "launch",
       "name": "Launch Program",
-      "runtimeArgs": ["-r", "ts-node/register/transpile-only"],
+      "runtimeArgs": ["-r", "ts-node/register/transpile-only", "-r", "tsconfig-paths/register"],
       "args": ["${workspaceFolder}/src/index.ts"],
       "outputCapture": "std",
       "internalConsoleOptions": "openOnSessionStart",
+      "preLaunchTask": "generate:schemas",
       "env": {
         "NODE_ENV": "development",
         "TS_NODE_SKIP_IGNORE": "true"
@@ -21,10 +22,11 @@
       "type": "node",
       "request": "launch",
       "name": "Launch Program - memory-db",
-      "runtimeArgs": ["-r", "ts-node/register/transpile-only"],
+      "runtimeArgs": ["-r", "ts-node/register/transpile-only", "-r", "tsconfig-paths/register"],
       "args": ["${workspaceFolder}/src/index.ts", "--compile-schemas"],
       "outputCapture": "std",
       "internalConsoleOptions": "openOnSessionStart",
+      "preLaunchTask": "generate:schemas",
       "env": {
         "STACKS_SIDECAR_DB": "memory",
         "NODE_ENV": "development",
diff --git a/.vscode/tasks.json b/.vscode/tasks.json
new file mode 100644
index 00000000..426f80c8
--- /dev/null
+++ b/.vscode/tasks.json
@@ -0,0 +1,15 @@
+{
+  // See https://go.microsoft.com/fwlink/?LinkId=733558
+  // for the documentation about the tasks.json format
+  "version": "2.0.0",
+  "tasks": [
+    {
+      "label": "generate:schemas",
+      "type": "npm",
+      "script": "generate:schemas",
+      "presentation": {
+        "reveal": "silent"
+      }
+    }
+  ]
+}
diff --git a/docs/api/transaction/get-transactions.schema.json b/docs/api/transaction/get-transactions.schema.json
index 104e8a40..be597e47 100644
--- a/docs/api/transaction/get-transactions.schema.json
+++ b/docs/api/transaction/get-transactions.schema.json
@@ -2,7 +2,6 @@
   "$schema": "http://json-schema.org/draft-07/schema#",
   "description": "GET request that returns transactions",
   "type": "object",
-  "additionalProperties": false,
   "required": ["results"],
   "properties": {
     "results": {
diff --git a/docs/entities/transactions/abstract-tx-event.schema.json b/docs/entities/transactions/abstract-tx-event.schema.json
index 3c7ccc2d..9e937ac7 100644
--- a/docs/entities/transactions/abstract-tx-event.schema.json
+++ b/docs/entities/transactions/abstract-tx-event.schema.json
@@ -2,7 +2,6 @@
   "$schema": "http://json-schema.org/draft-07/schema#",
   "type": "object",
   "description": "Abstract transaction event. Only present in `smart_contract` and `contract_call` tx types.",
-  "additionalProperties": false,
   "required": ["events"],
   "properties": {
     "events": {
diff --git a/docs/entities/transactions/transaction-0-token-transfer.schema.json b/docs/entities/transactions/transaction-0-token-transfer.schema.json
index 8bb4deea..de26d168 100644
--- a/docs/entities/transactions/transaction-0-token-transfer.schema.json
+++ b/docs/entities/transactions/transaction-0-token-transfer.schema.json
@@ -13,7 +13,6 @@
     {
       "type": "object",
       "required": ["tx_type", "token_transfer"],
-      "additionalProperties": false,
       "properties": {
         "tx_type": {
           "type": "string",
diff --git a/docs/entities/transactions/transaction-1-smart-contract.schema.json b/docs/entities/transactions/transaction-1-smart-contract.schema.json
index 877965a6..e265ca2c 100644
--- a/docs/entities/transactions/transaction-1-smart-contract.schema.json
+++ b/docs/entities/transactions/transaction-1-smart-contract.schema.json
@@ -12,7 +12,6 @@
     },
     {
       "type": "object",
-      "additionalProperties": false,
       "required": ["tx_type", "smart_contract"],
       "properties": {
         "tx_type": {
diff --git a/docs/entities/transactions/transaction-2-contract-call.schema.json b/docs/entities/transactions/transaction-2-contract-call.schema.json
index 42309062..5d6755df 100644
--- a/docs/entities/transactions/transaction-2-contract-call.schema.json
+++ b/docs/entities/transactions/transaction-2-contract-call.schema.json
@@ -12,7 +12,6 @@
     },
     {
       "type": "object",
-      "additionalProperties": false,
       "required": ["tx_type", "contract_call"],
       "properties": {
         "tx_type": {
diff --git a/gulpfile.js b/gulpfile.js
index de9feb6e..3a71b205 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -31,5 +31,5 @@ function clean() {
 }
 
 exports.default = parallel(flattenSchemas, copyFiles);
-
+exports.flattenSchemas = flattenSchemas;
 exports.deployDocs = series(deployToGithubPages, clean);
diff --git a/package-lock.json b/package-lock.json
index d9ecfde9..b16393fc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -874,6 +874,15 @@
       "integrity": "sha512-+iTbntw2IZPb/anVDbypzfQa+ay64MW0Zo8aJ8gZPWMMK6/OubMVb6lUPMagqjOPnmtauXnFCACVl3O7ogjeqQ==",
       "dev": true
     },
+    "@types/ajv": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/@types/ajv/-/ajv-1.0.0.tgz",
+      "integrity": "sha1-T7JEB0Ly9sMOf7B5e4OfxvaWaCo=",
+      "dev": true,
+      "requires": {
+        "ajv": "*"
+      }
+    },
     "@types/babel__core": {
       "version": "7.1.6",
       "resolved": "https://registry.npmjs.org/@types/babel__core/-/babel__core-7.1.6.tgz",
@@ -1012,15 +1021,6 @@
         "@types/range-parser": "*"
       }
     },
-    "@types/fs-extra": {
-      "version": "8.1.0",
-      "resolved": "https://registry.npmjs.org/@types/fs-extra/-/fs-extra-8.1.0.tgz",
-      "integrity": "sha512-UoOfVEzAUpeSPmjm7h1uk5MH6KZma2z2O7a75onTGjnNvAvMVrPzPL/vBbT65iIGHWj6rokwfmYcmxmlSf2uwg==",
-      "dev": true,
-      "requires": {
-        "@types/node": "*"
-      }
-    },
     "@types/glob": {
       "version": "7.1.1",
       "resolved": "https://registry.npmjs.org/@types/glob/-/glob-7.1.1.tgz",
diff --git a/package.json b/package.json
index 7b09cdc2..2adf84a7 100644
--- a/package.json
+++ b/package.json
@@ -14,8 +14,9 @@
     "lint:fix": "eslint . --ext .js,.jsx,.ts,.tsx -f codeframe --fix",
     "migrate": "ts-node node_modules/.bin/node-pg-migrate -j ts",
     "generate:types": "ts-node ./scripts/generate-types.ts",
+    "generate:schemas": "gulp --silent && npm run generate:types",
     "generate:docs": "redoc-cli bundle --output .tmp/index.html docs/openapi.yaml",
-    "validate:schemas": "gulp --silent && ./scripts/validate-schemas.ts",
+    "validate:schemas": "gulp flattenSchemas --silent && ./scripts/validate-schemas.ts",
     "deploy:docs": "npm run generate:types && npm run generate:docs && gulp deployDocs"
   },
   "repository": {
@@ -55,6 +56,7 @@
     "@apidevtools/json-schema-ref-parser": "^8.0.0",
     "@blockstack/eslint-config": "^1.0.3",
     "@blockstack/prettier-config": "0.0.6",
+    "@types/ajv": "^1.0.0",
     "@types/bluebird": "^3.5.30",
     "@types/bn.js": "^4.11.6",
     "@types/compression": "^1.7.0",
@@ -88,6 +90,7 @@
     "redoc-cli": "^0.9.7",
     "ts-jest": "^25.2.1",
     "ts-node": "^8.8.1",
+    "tsconfig-paths": "^3.9.0",
     "yaml-lint": "^1.2.4"
   }
 }
diff --git a/src/api/routes/tx.ts b/src/api/routes/tx.ts
index aaa12fc4..49cb7c4a 100644
--- a/src/api/routes/tx.ts
+++ b/src/api/routes/tx.ts
@@ -5,6 +5,10 @@ import * as Bluebird from 'bluebird';
 import { DataStore, DbTx } from '../../datastore/common';
 import { getTxFromDataStore } from '../controllers/db-controller';
 import { timeout, waiter } from '../../helpers';
+import { validate } from '../validate';
+
+import * as txSchema from '@schemas/entities/transactions/transaction.schema.json';
+import * as txResultsSchema from '@schemas/api/transaction/get-transactions.schema.json';
 
 export function createTxRouter(db: DataStore): RouterWithAsync {
   const router = addAsync(express.Router());
@@ -12,10 +16,11 @@ export function createTxRouter(db: DataStore): RouterWithAsync {
 
   router.getAsync('/', async (req, res) => {
     const txs = await db.getTxList();
-    const fullTxs = await Bluebird.mapSeries(txs.results, async tx => {
+    const results = await Bluebird.mapSeries(txs.results, async tx => {
       return await getTxFromDataStore(tx.tx_id, db);
     });
-    res.json({ results: fullTxs });
+    await validate(txResultsSchema, { results });
+    res.json({ results });
   });
 
   router.getAsync('/stream', async (req, res) => {
@@ -69,6 +74,7 @@ export function createTxRouter(db: DataStore): RouterWithAsync {
   router.getAsync('/:tx_id', async (req, res) => {
     const { tx_id } = req.params;
     const txResponse = await getTxFromDataStore(tx_id, db);
+    await validate(txSchema, txResponse);
     res.json(txResponse);
   });
 
diff --git a/src/api/validate.ts b/src/api/validate.ts
new file mode 100644
index 00000000..0104759d
--- /dev/null
+++ b/src/api/validate.ts
@@ -0,0 +1,8 @@
+import * as Ajv from 'ajv';
+
+export async function validate(schema: any, data: any) {
+  if (process.env.NODE_ENV !== 'development') return;
+  const ajv = new Ajv({ schemaId: 'auto' });
+  const valid = await ajv.validate(schema, data);
+  if (!valid) throw new Error(`Schema validation:\n\n ${JSON.stringify(ajv.errors, null, 2)}`);
+}
diff --git a/src/index.ts b/src/index.ts
index b9823feb..a0c8647a 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -26,10 +26,9 @@ import { TransactionPayloadTypeID } from './p2p/tx';
 loadDotEnv();
 
 const compileSchemas = process.argv.includes('--compile-schemas');
-const generateSchemas = () => exec('npm run generate:types');
+const generateSchemas = () => exec('npm run generate:schemas');
 
 if (compileSchemas) {
-  generateSchemas();
   watch('./docs', { recursive: true, filter: /\.schema\.json$/ }, () => generateSchemas());
 }
 
diff --git a/tsconfig.json b/tsconfig.json
index b8755abe..d6c80e9f 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -13,9 +13,10 @@
     "resolveJsonModule": true,
     "baseUrl": ".",
     "paths": {
-      "@entities": [".tmp/index.ts"]
+      "@entities": [".tmp/index.ts"],
+      "@schemas/*": [".tmp/*"]
     }
   },
-  "include": ["src/**/*", "migrations/**/*", "tests/**/*"],
-  "exclude": ["lib", ".tmp/**/*"]
+  "include": ["src/**/*", "migrations/**/*", "tests/**/*", ".tmp/**/*.schema.json"],
+  "exclude": ["lib", ".tmp"]
 }