diff --git a/migrations/1676395230930_inscriptions.ts b/migrations/1676395230930_inscriptions.ts
index 9fabef9b..c7d9e927 100644
--- a/migrations/1676395230930_inscriptions.ts
+++ b/migrations/1676395230930_inscriptions.ts
@@ -22,11 +22,11 @@ export function up(pgm: MigrationBuilder): void {
       notNull: true,
     },
     block_hash: {
-      type: 'text',
+      type: 'bytea',
       notNull: true,
     },
     tx_id: {
-      type: 'text',
+      type: 'bytea',
       notNull: true,
     },
     address: {
diff --git a/src/api/routes/inscriptions.ts b/src/api/routes/inscriptions.ts
index 68eec20d..9d950baa 100644
--- a/src/api/routes/inscriptions.ts
+++ b/src/api/routes/inscriptions.ts
@@ -1,5 +1,6 @@
 import { TypeBoxTypeProvider } from '@fastify/type-provider-typebox';
 import { Type } from '@sinclair/typebox';
+import { TypeCompiler } from '@sinclair/typebox/compiler';
 import { Value } from '@sinclair/typebox/value';
 import { FastifyPluginCallback } from 'fastify';
 import { Server } from 'http';
@@ -12,14 +13,19 @@ import {
   NotFoundResponse,
   OffsetParam,
   PaginatedResponse,
+  BlockHashParam,
 } from '../types';
 import {
   DEFAULT_API_LIMIT,
   parseDbInscriptions,
   parseDbInscription,
   hexToBuffer,
+  normalizeHashString,
 } from '../util/helpers';
 
+const BlockHashParamCType = TypeCompiler.Compile(BlockHashParam);
+const BlockHeightParamCType = TypeCompiler.Compile(BlockHeightParam);
+
 export const InscriptionRoutes: FastifyPluginCallback<
   Record<never, never>,
   Server,
@@ -33,7 +39,7 @@ export const InscriptionRoutes: FastifyPluginCallback<
         description: 'Retrieves inscriptions',
         tags: ['Inscriptions'],
         querystring: Type.Object({
-          block_height: Type.Optional(BlockHeightParam),
+          block: Type.Optional(Type.Union([BlockHashParam, BlockHeightParam])),
           address: Type.Optional(BitcoinAddressParam),
           offset: Type.Optional(OffsetParam),
           limit: Type.Optional(LimitParam),
@@ -47,7 +53,17 @@ export const InscriptionRoutes: FastifyPluginCallback<
     async (request, reply) => {
       const limit = request.query.limit ?? DEFAULT_API_LIMIT;
       const offset = request.query.offset ?? 0;
-      const inscriptions = await fastify.db.getInscriptions({ ...request.query, limit, offset });
+      const blockArg = BlockHashParamCType.Check(request.query.block)
+        ? { block_hash: normalizeHashString(request.query.block) as string }
+        : BlockHeightParamCType.Check(request.query.block)
+        ? { block_height: request.query.block }
+        : {};
+      const inscriptions = await fastify.db.getInscriptions({
+        ...blockArg,
+        address: request.query.address,
+        limit,
+        offset,
+      });
       await reply.send({
         limit,
         offset,
diff --git a/src/api/types.ts b/src/api/types.ts
index a2f2292e..f3704ab6 100644
--- a/src/api/types.ts
+++ b/src/api/types.ts
@@ -1,18 +1,18 @@
 import { Static, TSchema, Type } from '@sinclair/typebox';
 import { SatoshiRarity } from './util/ordinal-satoshi';
 
-const BitcoinAddressRegEx = /(bc1|[13])[a-zA-HJ-NP-Z0-9]{25,39}/;
-export const BitcoinAddressParam = Type.RegEx(BitcoinAddressRegEx);
+export const BitcoinAddressParam = Type.RegEx(/^(bc1|[13])[a-zA-HJ-NP-Z0-9]{25,39}$/);
 
-const InscriptionIdRegEx = /[a-fA-F0-9]{64}i[0-9]+/;
-export const InscriptionIdParam = Type.RegEx(InscriptionIdRegEx, {
+export const InscriptionIdParam = Type.RegEx(/^[a-fA-F0-9]{64}i[0-9]+$/, {
   description: 'Inscription ID',
   examples: ['38c46a8bf7ec90bc7f6b797e7dc84baa97f4e5fd4286b92fe1b50176d03b18dci0'],
 });
 
 export const OrdinalParam = Type.Integer();
 
-export const BlockHeightParam = Type.Integer();
+export const BlockHeightParam = Type.RegEx(/^[0-9]+$/);
+
+export const BlockHashParam = Type.RegEx(/^(0x)?[0]{8}[a-fA-F0-9]{56}$/);
 
 export const OffsetParam = Type.Integer({ minimum: 0 });
 
diff --git a/src/api/util/helpers.ts b/src/api/util/helpers.ts
index 246dbe30..d067e77d 100644
--- a/src/api/util/helpers.ts
+++ b/src/api/util/helpers.ts
@@ -39,3 +39,25 @@ export function hexToBuffer(hex: string): Buffer {
   }
   return Buffer.from(hex.substring(2), 'hex');
 }
+
+export const has0xPrefix = (id: string) => id.substr(0, 2).toLowerCase() === '0x';
+
+/**
+ * Check if the input is a valid 32-byte hex string. If valid, returns a
+ * lowercase and 0x-prefixed hex string. If invalid, returns false.
+ */
+export function normalizeHashString(input: string): string | false {
+  if (typeof input !== 'string') {
+    return false;
+  }
+  let hashBuffer: Buffer | undefined;
+  if (input.length === 66 && has0xPrefix(input)) {
+    hashBuffer = Buffer.from(input.slice(2), 'hex');
+  } else if (input.length === 64) {
+    hashBuffer = Buffer.from(input, 'hex');
+  }
+  if (hashBuffer === undefined || hashBuffer.length !== 32) {
+    return false;
+  }
+  return `0x${hashBuffer.toString('hex')}`;
+}
diff --git a/src/pg/pg-store.ts b/src/pg/pg-store.ts
index 4ea48d57..ed284df3 100644
--- a/src/pg/pg-store.ts
+++ b/src/pg/pg-store.ts
@@ -71,6 +71,7 @@ export class PgStore extends BasePgStore {
 
   async getInscriptions(args: {
     block_height?: number;
+    block_hash?: string;
     address?: string;
     limit: number;
     offset: number;
@@ -80,6 +81,7 @@ export class PgStore extends BasePgStore {
       FROM inscriptions
       WHERE true
         ${args.block_height ? this.sql`AND block_height = ${args.block_height}` : this.sql``}
+        ${args.block_hash ? this.sql`AND block_hash = ${args.block_hash}` : this.sql``}
         ${args.address ? this.sql`AND address = ${args.address}` : this.sql``}
       ORDER BY block_height DESC
       LIMIT ${args.limit}