diff --git a/package.json b/package.json
index 24c6561..3b8eddb 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@x402r/erc8004",
-  "version": "0.1.0-alpha.2",
+  "version": "0.1.0-alpha.1",
   "description": "Lightweight TypeScript SDK for ERC-8004 (Trustless Agents) — Identity and Reputation registries",
   "type": "module",
   "license": "Apache-2.0",
diff --git a/src/index.ts b/src/index.ts
index e74f887..4d28c51 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -43,7 +43,6 @@ export {
 export type {
   AgentRegistrationFile,
   CreateRegistrationFileParameters,
-  FetchRegistrationFileOptions,
   RegistrationBinding,
   ResolvedServiceEndpoint,
   ResolveServiceEndpointParameters,
diff --git a/src/registration/fetch.ts b/src/registration/fetch.ts
index 7db818c..0ef888b 100644
--- a/src/registration/fetch.ts
+++ b/src/registration/fetch.ts
@@ -1,47 +1,21 @@
 import { parseRegistrationFile } from './parse.js'
 import type { AgentRegistrationFile } from './types.js'
 
-const DEFAULT_IPFS_GATEWAY = 'https://ipfs.io'
-
-export interface FetchRegistrationFileOptions {
-  /** IPFS gateway base URL. Default: `https://ipfs.io`. */
-  ipfsGateway?: string
-}
-
 /**
- * Fetch and validate an Agent Registration File from a URI.
+ * Fetch and validate an Agent Registration File from an HTTPS URL.
  *
- * Supported schemes:
- * - `https://` — fetched via `globalThis.fetch`
- * - `data:application/json;base64,...` — decoded inline (fully on-chain storage)
- * - `data:application/json,...` — URL-decoded inline
- * - `ipfs://<cid>` — resolved via public IPFS gateway (configurable)
+ * Uses `globalThis.fetch` — no external HTTP dependencies required.
  *
- * @throws on unsupported scheme, non-200 response, non-JSON body, or invalid schema
+ * @throws on non-HTTPS URL, non-200 response, non-JSON body, or invalid schema
  */
 export async function fetchRegistrationFile(
   uri: string,
-  options?: FetchRegistrationFileOptions,
 ): Promise<AgentRegistrationFile> {
-  if (uri.startsWith('data:')) {
-    return parseDataUri(uri)
+  if (!uri.startsWith('https://')) {
+    throw new Error(`Only HTTPS URIs are supported, got: ${uri.slice(0, 40)}`)
   }
 
-  let fetchUrl: string
-  if (uri.startsWith('ipfs://')) {
-    const gateway = options?.ipfsGateway ?? DEFAULT_IPFS_GATEWAY
-    const base = gateway.endsWith('/') ? gateway.slice(0, -1) : gateway
-    const path = uri.slice(7) // strip "ipfs://"
-    fetchUrl = `${base}/ipfs/${path}`
-  } else if (uri.startsWith('https://')) {
-    fetchUrl = uri
-  } else {
-    throw new Error(
-      `Unsupported URI scheme (expected https, data, or ipfs): ${uri.slice(0, 40)}`,
-    )
-  }
-
-  const response = await globalThis.fetch(fetchUrl, {
+  const response = await globalThis.fetch(uri, {
     signal: AbortSignal.timeout(10_000),
   })
 
@@ -65,50 +39,3 @@ export async function fetchRegistrationFile(
 
   return parseRegistrationFile(json)
 }
-
-// ---------------------------------------------------------------------------
-// data: URI parsing
-// ---------------------------------------------------------------------------
-
-function parseDataUri(uri: string): AgentRegistrationFile {
-  const commaIndex = uri.indexOf(',')
-  if (commaIndex === -1) {
-    throw new Error('Malformed data URI: missing comma separator')
-  }
-
-  const header = uri.slice(5, commaIndex) // strip "data:" prefix
-  const payload = uri.slice(commaIndex + 1)
-
-  // Validate MIME type — accept application/json with optional charset
-  const mimeEnd = header.indexOf(';')
-  const mime = mimeEnd === -1 ? header : header.slice(0, mimeEnd)
-  if (mime !== 'application/json') {
-    throw new Error(
-      `data URI must have application/json MIME type, got: ${mime}`,
-    )
-  }
-
-  const isBase64 = header.endsWith(';base64')
-
-  let decoded: string
-  try {
-    decoded = isBase64 ? atob(payload) : decodeURIComponent(payload)
-  } catch {
-    throw new Error(
-      `Failed to decode data URI (${isBase64 ? 'base64' : 'percent-encoded'})`,
-    )
-  }
-
-  if (decoded.length > 1_048_576) {
-    throw new Error('Registration file exceeds 1 MB size limit')
-  }
-
-  let json: unknown
-  try {
-    json = JSON.parse(decoded)
-  } catch {
-    throw new Error('data URI content is not valid JSON')
-  }
-
-  return parseRegistrationFile(json)
-}
diff --git a/src/registration/index.ts b/src/registration/index.ts
index 651a6dd..997c5a7 100644
--- a/src/registration/index.ts
+++ b/src/registration/index.ts
@@ -1,8 +1,5 @@
 export { createRegistrationFile } from './build.js'
-export {
-  type FetchRegistrationFileOptions,
-  fetchRegistrationFile,
-} from './fetch.js'
+export { fetchRegistrationFile } from './fetch.js'
 export { parseRegistrationFile } from './parse.js'
 export { resolveServiceEndpoint } from './resolve.js'
 export { findService, findServices } from './services.js'
diff --git a/src/registration/resolve.ts b/src/registration/resolve.ts
index c2bfae3..7c55c47 100644
--- a/src/registration/resolve.ts
+++ b/src/registration/resolve.ts
@@ -31,9 +31,7 @@ export async function resolveServiceEndpoint(
 
   let file: AgentRegistrationFile
   try {
-    file = await fetchRegistrationFile(agent.agentURI, {
-      ipfsGateway: parameters.ipfsGateway,
-    })
+    file = await fetchRegistrationFile(agent.agentURI)
   } catch (error) {
     throw new Error(
       `Agent ${parameters.agentId}: ${error instanceof Error ? error.message : String(error)}`,
diff --git a/src/registration/types.ts b/src/registration/types.ts
index 5e93e88..ac4d8c1 100644
--- a/src/registration/types.ts
+++ b/src/registration/types.ts
@@ -35,8 +35,6 @@ export interface ResolveServiceEndpointParameters {
   agentId: bigint
   serviceName: string
   registryAddress?: Address
-  /** IPFS gateway base URL for `ipfs://` agent URIs. Default: `https://ipfs.io`. */
-  ipfsGateway?: string
 }
 
 export interface ResolvedServiceEndpoint {
diff --git a/tests/registration.test.ts b/tests/registration.test.ts
index eb9c7ac..5c8a908 100644
--- a/tests/registration.test.ts
+++ b/tests/registration.test.ts
@@ -319,132 +319,10 @@ describe('fetchRegistrationFile', () => {
     expect(result.name).toBe('My Agent')
   })
 
-  it('throws on unsupported URI scheme', async () => {
+  it('throws on non-HTTPS URL', async () => {
     await expect(
       fetchRegistrationFile('http://example.com/agent.json'),
-    ).rejects.toThrow('Unsupported URI scheme')
-    await expect(
-      fetchRegistrationFile('ftp://example.com/file'),
-    ).rejects.toThrow('Unsupported URI scheme')
-  })
-
-  // --- data: URIs ---
-
-  it('parses base64-encoded data URI', async () => {
-    const json = JSON.stringify(validPayload())
-    const encoded = btoa(json)
-    const result = await fetchRegistrationFile(
-      `data:application/json;base64,${encoded}`,
-    )
-    expect(result.name).toBe('My Agent')
-  })
-
-  it('parses URL-encoded data URI', async () => {
-    const json = JSON.stringify(validPayload())
-    const encoded = encodeURIComponent(json)
-    const result = await fetchRegistrationFile(
-      `data:application/json,${encoded}`,
-    )
-    expect(result.name).toBe('My Agent')
-  })
-
-  it('parses data URI with charset parameter', async () => {
-    const json = JSON.stringify(validPayload())
-    const encoded = btoa(json)
-    const result = await fetchRegistrationFile(
-      `data:application/json;charset=utf-8;base64,${encoded}`,
-    )
-    expect(result.name).toBe('My Agent')
-  })
-
-  it('throws on data URI with wrong MIME type', async () => {
-    await expect(
-      fetchRegistrationFile('data:text/plain;base64,aGVsbG8='),
-    ).rejects.toThrow('application/json MIME type')
-  })
-
-  it('throws on data URI with malformed base64', async () => {
-    await expect(
-      fetchRegistrationFile('data:application/json;base64,!!!invalid'),
-    ).rejects.toThrow('Failed to decode')
-  })
-
-  it('throws on data URI with invalid JSON', async () => {
-    const encoded = btoa('not json')
-    await expect(
-      fetchRegistrationFile(`data:application/json;base64,${encoded}`),
-    ).rejects.toThrow('not valid JSON')
-  })
-
-  it('throws on data URI exceeding size limit', async () => {
-    const big = JSON.stringify({
-      ...validPayload(),
-      pad: 'x'.repeat(1_048_577),
-    })
-    const encoded = btoa(big)
-    await expect(
-      fetchRegistrationFile(`data:application/json;base64,${encoded}`),
-    ).rejects.toThrow('exceeds 1 MB')
-  })
-
-  it('throws on data URI missing comma', async () => {
-    await expect(
-      fetchRegistrationFile('data:application/json;base64'),
-    ).rejects.toThrow('missing comma')
-  })
-
-  // --- ipfs:// URIs ---
-
-  it('rewrites ipfs:// to default gateway', async () => {
-    const fetchSpy = mockFetch(JSON.stringify(validPayload()))
-    vi.stubGlobal('fetch', fetchSpy)
-
-    await fetchRegistrationFile('ipfs://QmTest123')
-
-    expect(fetchSpy).toHaveBeenCalledWith(
-      'https://ipfs.io/ipfs/QmTest123',
-      expect.anything(),
-    )
-  })
-
-  it('accepts custom ipfsGateway', async () => {
-    const fetchSpy = mockFetch(JSON.stringify(validPayload()))
-    vi.stubGlobal('fetch', fetchSpy)
-
-    await fetchRegistrationFile('ipfs://QmTest123', {
-      ipfsGateway: 'https://gateway.pinata.cloud',
-    })
-
-    expect(fetchSpy).toHaveBeenCalledWith(
-      'https://gateway.pinata.cloud/ipfs/QmTest123',
-      expect.anything(),
-    )
-  })
-
-  it('handles ipfs:// with path after CID', async () => {
-    const fetchSpy = mockFetch(JSON.stringify(validPayload()))
-    vi.stubGlobal('fetch', fetchSpy)
-
-    await fetchRegistrationFile('ipfs://QmTest123/metadata.json')
-
-    expect(fetchSpy).toHaveBeenCalledWith(
-      'https://ipfs.io/ipfs/QmTest123/metadata.json',
-      expect.anything(),
-    )
-  })
-
-  it('handles ipfsGateway with trailing slash', async () => {
-    const fetchSpy = mockFetch(JSON.stringify(validPayload()))
-    vi.stubGlobal('fetch', fetchSpy)
-
-    await fetchRegistrationFile('ipfs://QmTest123', {
-      ipfsGateway: 'https://ipfs.io/',
-    })
-
-    expect(fetchSpy).toHaveBeenCalledWith(
-      'https://ipfs.io/ipfs/QmTest123',
-      expect.anything(),
-    )
+    ).rejects.toThrow('Only HTTPS URIs are supported')
   })
 
   it('throws on non-200 response', async () => {