diff --git a/doc/manual/rl-next/c-api-new-store-methods.md b/doc/manual/rl-next/c-api-new-store-methods.md
new file mode 100644
index 00000000000..28792e7cc42
--- /dev/null
+++ b/doc/manual/rl-next/c-api-new-store-methods.md
@@ -0,0 +1,9 @@
+---
+synopsis: "C API: New store API methods"
+prs: [14766]
+---
+
+The C API now includes additional methods:
+
+- `nix_store_query_path_from_hash_part()` - Get the full store path given its hash part
+- `nix_store_copy_path()` - Copy a single store path between two stores, allows repairs and configuring signature checking
diff --git a/src/libstore-c/nix_api_store.cc b/src/libstore-c/nix_api_store.cc
index 80fcf10cb0d..4133d769f21 100644
--- a/src/libstore-c/nix_api_store.cc
+++ b/src/libstore-c/nix_api_store.cc
@@ -453,4 +453,42 @@ nix_err nix_derivation_get_outputs_and_optpaths(
     NIXC_CATCH_ERRS
 }
 
+StorePath * nix_store_query_path_from_hash_part(nix_c_context * context, Store * store, const char * hash)
+{
+    if (context)
+        context->last_err_code = NIX_OK;
+    try {
+        std::optional<nix::StorePath> s = store->ptr->queryPathFromHashPart(hash);
+
+        if (!s.has_value()) {
+            return nullptr;
+        }
+
+        return new StorePath{std::move(s.value())};
+    }
+    NIXC_CATCH_ERRS_NULL
+}
+
+nix_err nix_store_copy_path(
+    nix_c_context * context, Store * srcStore, Store * dstStore, const StorePath * path, bool repair, bool checkSigs)
+{
+    if (context)
+        context->last_err_code = NIX_OK;
+    try {
+        if (srcStore == nullptr)
+            return nix_set_err_msg(context, NIX_ERR_UNKNOWN, "Source store is null");
+
+        if (dstStore == nullptr)
+            return nix_set_err_msg(context, NIX_ERR_UNKNOWN, "Destination store is null");
+
+        if (path == nullptr)
+            return nix_set_err_msg(context, NIX_ERR_UNKNOWN, "Store path is null");
+
+        auto repairFlag = repair ? nix::RepairFlag::Repair : nix::RepairFlag::NoRepair;
+        auto checkSigsFlag = checkSigs ? nix::CheckSigsFlag::CheckSigs : nix::CheckSigsFlag::NoCheckSigs;
+        nix::copyStorePath(*srcStore->ptr, *dstStore->ptr, path->path, repairFlag, checkSigsFlag);
+    }
+    NIXC_CATCH_ERRS
+}
+
 } // extern "C"
diff --git a/src/libstore-c/nix_api_store.h b/src/libstore-c/nix_api_store.h
index 5e542b0caaf..964c4066154 100644
--- a/src/libstore-c/nix_api_store.h
+++ b/src/libstore-c/nix_api_store.h
@@ -357,6 +357,30 @@ nix_err nix_derivation_get_outputs_and_optpaths(
 nix_err nix_derivation_to_json(
     nix_c_context * context, const nix_derivation * drv, nix_get_string_callback callback, void * userdata);
 
+/**
+ * @brief Query the full store path given the hash part of a valid store
+ * path, or empty if no matching path is found.
+ *
+ * @param[out] context Optional, stores error information
+ * @param[in] store nix store reference
+ * @param[in] hash Hash part of path as a string
+ * @return Store path reference, NULL if no matching path is found.
+ */
+StorePath * nix_store_query_path_from_hash_part(nix_c_context * context, Store * store, const char * hash);
+
+/**
+ * @brief Copy a path from one store to another.
+ *
+ * @param[out] context Optional, stores error information
+ * @param[in] srcStore nix source store reference
+ * @param[in] dstStore nix destination store reference
+ * @param[in] path The path to copy
+ * @param[in] repair Whether to repair the path
+ * @param[in] checkSigs Whether to check path signatures are trusted before copying
+ */
+nix_err nix_store_copy_path(
+    nix_c_context * context, Store * srcStore, Store * dstStore, const StorePath * path, bool repair, bool checkSigs);
+
 // cffi end
 #ifdef __cplusplus
 }