diff --git a/core/libs/prx/libSceHttp/Export.cpp b/core/libs/prx/libSceHttp/Export.cpp
index fa00ad2d7..1d10d5348 100644
--- a/core/libs/prx/libSceHttp/Export.cpp
+++ b/core/libs/prx/libSceHttp/Export.cpp
@@ -172,6 +172,12 @@ int APS5_VABI sceHttpSetRecvTimeOut(int id, uint32_t usec) {
     return 0;
 }
 
+int APS5_VABI sceHttpSetResponseHeaderMaxSize(int id, uint64_t header_size) {
+    (void)id;
+    (void)header_size;
+    return 0;
+}
+
 int APS5_VABI sceHttpSetRequestContentLength(int request_id, uint64_t content_length) {
     (void)request_id;
     (void)content_length;
@@ -242,6 +248,11 @@ int APS5_VABI sceHttpReadData(int request_id, void* data, size_t size) {
     return ERROR_NETWORK;
 }
 
+int APS5_VABI sceHttpRedirectCacheFlush(int http_ctx_id) {
+    (void)http_ctx_id;
+    return 0;
+}
+
 int APS5_VABI sceHttpSetChunkedTransferEnabled(int id, int enable) {
     (void)id;
     (void)enable;
@@ -345,6 +356,11 @@ int APS5_VABI sceHttpsLoadCert(int http_ctx_id, int num, void* ca_list, void* ce
     return 0;
 }
 
+int APS5_VABI sceHttpsUnloadCert(int http_ctx_id) {
+    (void)http_ctx_id;
+    return 0;
+}
+
 int APS5_VABI sceHttpGetLastErrno(int request_id, int* errno_out) {
     (void)request_id;
     if (errno_out == nullptr) {
diff --git a/core/libs/tests/GuestHttp.cpp b/core/libs/tests/GuestHttp.cpp
index 1a5d01074..ae625c507 100644
--- a/core/libs/tests/GuestHttp.cpp
+++ b/core/libs/tests/GuestHttp.cpp
@@ -18,6 +18,9 @@ int APS5_VABI sceHttpCreateRequest2(int, const char*, const char*, std::uint64_t
 int APS5_VABI sceHttpsEnableOption(int, std::uint32_t);
 int APS5_VABI sceHttpsLoadCert(int, int, void*, void*, void*);
 int APS5_VABI sceHttpGetLastErrno(int, int*);
+int APS5_VABI sceHttpSetResponseHeaderMaxSize(int, std::uint64_t);
+int APS5_VABI sceHttpRedirectCacheFlush(int);
+int APS5_VABI sceHttpsUnloadCert(int);
 int APS5_VABI sceHttpParseStatusLine(const char*, std::size_t, std::int32_t*, std::int32_t*, std::int32_t*, const char**, std::size_t*);
 }
 
@@ -137,6 +140,9 @@ int main() {
     Require(sceHttpSetInflateGZIPEnabled(1, -1) == invalidValue);
     Require(sceHttpsEnableOption(1, 0) == 0);
     Require(sceHttpsLoadCert(1, 0, nullptr, nullptr, nullptr) == 0);
+    Require(sceHttpsUnloadCert(1) == 0);
+    Require(sceHttpSetResponseHeaderMaxSize(1, 8192) == 0);
+    Require(sceHttpRedirectCacheFlush(1) == 0);
     int httpErrno = -1;
     Require(sceHttpGetLastErrno(1, &httpErrno) == 0);
     Require(httpErrno == 0);
diff --git a/docs/dev/TechnicalDebt.md b/docs/dev/TechnicalDebt.md
index 4e605cf32..9c35efd56 100644
--- a/docs/dev/TechnicalDebt.md
+++ b/docs/dev/TechnicalDebt.md
@@ -26,6 +26,7 @@ Throughout the project, every function at every stage either **does exactly what
 - [libSceNpTrophy2](../../core/libs/prx/libSceNpTrophy2/src/GameInfo.cpp): `sceNpTrophy2RegisterUnlockCallback` accepts a callback that is never called, as no trophy is ever unlocked, and `sceNpTrophy2UnregisterUnlockCallback` only returns success.
 - [sceAvPlayerSetTrickSpeed](../../core/libs/prx/libSceAvPlayer/src/Source.cpp) (libSceAvPlayer) with a negative speed runs the clock backwards but delivers no frames; when a forward speed is set again, playback resumes from the rewound time.
 - [ulobjmgr](../../core/libs/prx/ulobjmgr/Export.cpp) registers no object: `_sceUlobjmgrRegisterObject` always hands out id 0 and `_sceUlobjmgrUnregisterObject` releases nothing, as shadPS4 does
+- [libSceHttp](../../core/libs/prx/libSceHttp/Export.cpp) - no request reaches the network, so `sceHttpSetResponseHeaderMaxSize` has no response header to limit and `sceHttpRedirectCacheFlush` no redirect to forget; `sceHttpsUnloadCert` returns success like `sceHttpsLoadCert`, which keeps no certificate
 
 ### Unknown function info
 
@@ -106,6 +107,7 @@ Throughout the project, every function at every stage either **does exactly what
 - [sceHttpParseResponseHeader](../../core/libs/prx/libSceHttp/Export.cpp) (libSceHttp) - signature follows [SharpProspero](https://github.com/SvenGDK/SharpProspero/blob/main/src/SharpProspero/Interop/Net/Http.cs); parsing and error codes follow [shadPS4's reverse-engineered PS4 library](https://github.com/shadps4-emu/shadPS4/blob/main/src/core/libraries/network/http.cpp), not confirmed on a PS5 title or hardware. Folded values retain their line breaks and whitespace; an empty first line starts the value scan after its line feed. A consumed byte count above `INT_MAX` throws instead of wrapping.
 - [sceHttpParseStatusLine](../../core/libs/prx/libSceHttp/src/Parse.cpp) (libSceHttp) - behaviour and error codes follow the [shadPS4](https://github.com/shadps4-emu/shadPS4) reimplementation of the PS4 library, not confirmed on a PS5 title; unlike it, no byte past `lineLen` is read
 - [sceHttpUriUnescape](../../core/libs/prx/libSceHttp/src/Uri.cpp) (libSceHttp) - signature follows [SharpProspero](https://github.com/SvenGDK/SharpProspero/blob/main/src/SharpProspero/Interop/Net/Http.cs); percent decoding, invalid sequences and error codes follow [shadPS4](https://github.com/shadps4-emu/shadPS4/blob/main/src/core/libraries/network/http.cpp), not confirmed on a PS5 title or hardware. Size includes the final NUL; malformed escapes and `+` remain unchanged, and decoding runs once.
+- [sceHttpSetResponseHeaderMaxSize, sceHttpRedirectCacheFlush, sceHttpsUnloadCert](../../core/libs/prx/libSceHttp/Export.cpp) (libSceHttp) - signatures follow [shadPS4](https://github.com/shadps4-emu/shadPS4/blob/main/src/core/libraries/network/http.cpp) (PS4); no PS5 reference has them
 - [sceHttp2GetMemoryPoolStats](../../core/libs/prx/libSceHttp2/Export.cpp) (libSceHttp2) - unknown signature
 - [sceNetGetMemoryPoolStats](../../core/libs/prx/libSceNet/Export.cpp) (libSceNet) - unknown signature
 - [sceHttpSetRequestStatusCallback](../../core/libs/prx/libSceHttp/Export.cpp) (libSceHttp) - no reference implements it (shadPS4 only logs and returns 0); when the callback runs and what status it gets is unknown