diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/zsum/README.md b/lib/node_modules/@stdlib/blas/ext/base/ndarray/zsum/README.md
index cc09d158d740..fecaa94a8438 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/ndarray/zsum/README.md
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/zsum/README.md
@@ -98,6 +98,157 @@ console.log( v );
+
+
+* * *
+
+
+
+## C APIs
+
+
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+
+
+### Usage
+
+```c
+#include "stdlib/blas/ext/base/ndarray/zsum.h"
+```
+
+#### stdlib_blas_ext_zsum( arrays )
+
+Computes the sum of all elements in a one-dimensional double-precision complex floating-point ndarray.
+
+```c
+#include "stdlib/complex/float64/ctor.h"
+#include "stdlib/ndarray/ctor.h"
+#include "stdlib/ndarray/dtypes.h"
+#include "stdlib/ndarray/index_modes.h"
+#include "stdlib/ndarray/orders.h"
+#include "stdlib/ndarray/base/bytes_per_element.h"
+#include
+
+// Create an ndarray:
+const double data[] = { 1.0, 2.0, 3.0, 4.0 };
+int64_t shape[] = { 2 };
+int64_t strides[] = { STDLIB_NDARRAY_COMPLEX128_BYTES_PER_ELEMENT };
+int8_t submodes[] = { STDLIB_NDARRAY_INDEX_ERROR };
+
+struct ndarray *x = stdlib_ndarray_allocate( STDLIB_NDARRAY_COMPLEX128, (uint8_t *)data, 1, shape, strides, 0, STDLIB_NDARRAY_ROW_MAJOR, STDLIB_NDARRAY_INDEX_ERROR, 1, submodes );
+
+// Compute the sum:
+const struct ndarray *arrays[] = { x };
+stdlib_complex128_t v = stdlib_blas_ext_zsum( arrays );
+// returns [ 4.0, 6.0 ]
+
+// Free allocated memory:
+stdlib_ndarray_free( x );
+```
+
+The function accepts the following arguments:
+
+- **arrays**: `[in] struct ndarray**` list containing a one-dimensional input ndarray.
+
+```c
+stdlib_complex128_t stdlib_blas_ext_zsum( const struct ndarray *arrays[] );
+```
+
+
+
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+
+
+### Examples
+
+```c
+#include "stdlib/blas/ext/base/ndarray/zsum.h"
+#include "stdlib/complex/float64/ctor.h"
+#include "stdlib/complex/float64/real.h"
+#include "stdlib/complex/float64/imag.h"
+#include "stdlib/ndarray/ctor.h"
+#include "stdlib/ndarray/dtypes.h"
+#include "stdlib/ndarray/index_modes.h"
+#include "stdlib/ndarray/orders.h"
+#include "stdlib/ndarray/base/bytes_per_element.h"
+#include
+#include
+#include
+
+int main( void ) {
+ // Create a data buffer:
+ const double data[] = { 1.0, -2.0, 3.0, -4.0, 5.0, -6.0, 7.0, -8.0 };
+
+ // Specify the number of array dimensions:
+ const int64_t ndims = 1;
+
+ // Specify the array shape:
+ int64_t shape[] = { 4 };
+
+ // Specify the array strides:
+ int64_t strides[] = { STDLIB_NDARRAY_COMPLEX128_BYTES_PER_ELEMENT };
+
+ // Specify the byte offset:
+ const int64_t offset = 0;
+
+ // Specify the array order:
+ const enum STDLIB_NDARRAY_ORDER order = STDLIB_NDARRAY_ROW_MAJOR;
+
+ // Specify the index mode:
+ const enum STDLIB_NDARRAY_INDEX_MODE imode = STDLIB_NDARRAY_INDEX_ERROR;
+
+ // Specify the subscript index modes:
+ int8_t submodes[] = { STDLIB_NDARRAY_INDEX_ERROR };
+ const int64_t nsubmodes = 1;
+
+ // Create an ndarray:
+ struct ndarray *x = stdlib_ndarray_allocate( STDLIB_NDARRAY_COMPLEX128, (uint8_t *)data, ndims, shape, strides, offset, order, imode, nsubmodes, submodes );
+ if ( x == NULL ) {
+ fprintf( stderr, "Error allocating memory.\n" );
+ exit( 1 );
+ }
+
+ // Define a list of ndarrays:
+ const struct ndarray *arrays[] = { x };
+
+ // Compute the sum:
+ stdlib_complex128_t v = stdlib_blas_ext_zsum( arrays );
+
+ // Print the result:
+ printf( "sum: %lf + %lfi\n", stdlib_complex128_real( v ), stdlib_complex128_imag( v ) );
+
+ // Free allocated memory:
+ stdlib_ndarray_free( x );
+}
+```
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