ErrLookup › reactiveui/refit

reactiveui/refit

The automatic type-safe REST library for .NET Core, Xamarin and .NET. Heavily inspired by Square's Retrofit library, Refit turns your REST API into a live interface. · C# · 291 source files

Analyzed at b455f65ecc on 2026-08-13. 49 documented errors.

Code / Message	Type	Severity	Tags
Method " " is invalid. All REST Methods must return either…	validation	error	return-type, async, interface-design, reflection-builder
Sequence contains more than one matching element	exception	critical	refit, httpclientfactory, versioning, reflection, configuration
This Refit client was created with the generated-only API…	exception	error	source-generator, aot, reflection, request-builder, generated-only
Unexpected parameter type in a Multipart request. Parameter	validation	error	refit, multipart, serialization, attributes, runtime
URL path must not contain CR or LF characters	validation	error	security, validation, url, crlf-injection, reflection-builder
targetInterface must be an Interface	validation	error	refit, interface, reflection, configuration, design-time
Method must be defined and have an HTTP Method attribute	validation	error	refit, attributes, http-method, reflection, design-time
The character set provided in ContentType is invalid.	exception	error	refit, newtonsoft-json, encoding, charset, http-response, runtime
The configured content serializer	exception	error	serialization, api-exception, sync-vs-async, content-serializer
Multiple complex types found. Specify one parameter as the…	validation	error	body, ambiguous-binding, reflection-builder
No suitable Method found...	exception	error	refit, generic, reflection, design-time
Sequence contains no matching element	exception	critical	refit, httpclientfactory, versioning, reflection, configuration
This interface needs the reflection request builder, which…	exception	error	configuration, reflection, source-generator, nuget, notsupported, aot, rf006
Sequence contains no elements	exception	error	refit, attributes, http-method, reflection, design-time
Unsupported enum backing type for	exception	error	enum, json, system-text-json, enum-helpers, internal
BaseAddress must be set on the HttpClient instance	exception	error	configuration, http-client, url-resolution, base-address, invalidoperation
HeaderCollection parameter of type	validation	error	refit, headers, attributes, type-binding, design-time
The HttpResponseMessage has no associated RequestMessage…	exception	error	http, httpmessagehandler, api-exception, request-message, testing
Multipart requests may not contain a Body parameter	validation	error	multipart, body, attribute-conflict, reflection-builder
Parameter matches both a parameter and nested parameter on…	validation	error	refit, routing, parameter-binding, design-time
URL has parameter , but no method parameter matches	validation	error	refit, routing, url-template, attributes, design-time
Unable to convert ' ' to .	exception	error	json, enum, deserialization, system-text-json
The configured IHttpContentSerializer does not support…	exception	error	streaming, content-serializer, iasyncenumerable, notsupported, configuration
The response is unavailable for this API response.	exception	error	api-response, cancellation, transport-error, error-handling
URL has parameter }}, but no method parameter matches	validation	error	routing, template, url-parameter, argument, design-contract
`hostUrl` must not be null or whitespace.	validation	error	configuration, http-client, argument, base-address, argumentexception
The [Url] parameter value	validation	error	validation, url, argument, url-parameter, argumentexception
URL path must start with '/' and be of the form…	validation	error	routing, url-resolution, validation, argument, template
No stubbed route matched the request	exception	error	testing, stub, route-matching, stub-http
Unexpected token when parsing .	exception	error	json, enum, deserialization, system-text-json, token-type
Enum does not use a signed backing type.	exception	error	enum, json, enum-helpers, internal, signedness
Content must be an 'application/problem+json' compliant…	validation	error	validation, rfc7807, problem-details, argument, content
SystemTextJsonQueryConverter requires…	exception	error	serialization, query-converter, system-text-json, notsupported, configuration
The content serializer can't be null	validation	error	configuration, content-serializer, argument-null, constructor, argumentnullexception
Response must have an associated request message.	validation	error	api-response, http, request-message, validation
Problem details JSON must be an object.	exception	error	serialization, rfc7807, problem-details, json, jsonexception
expected request(s) were not made	exception	error	testing, stub, verification, stub-http
MethodName exists more than once, 'parameterTypes' mut be…	validation	error	refit, overloads, reflection, design-time
Argument list to method	validation	error	refit, cancellation, design-time
Response is successful, cannot create an ApiException.	validation	error	api-exception, validation, status-code
Only one parameter can be an Authorize parameter	validation	error	refit, auth, attributes, design-time
No request has been received yet.	exception	error	testing, stub, assertion, stub-http
Cannot convert an empty value to	exception	error	json, enum, deserialization, system-text-json
Enum does not use an unsigned backing type.	exception	error	enum, json, enum-helpers, internal, signedness
A [Url] method must not also declare a path template; [Url]…	validation	error	refit, url, routing, attributes, design-time
Only one parameter can be a Body parameter	validation	error	body, attribute-conflict, reflection-builder
Only one parameter can be a HeaderCollection parameter	validation	error	refit, headers, attributes, design-time
[Url] parameter " " must be of type string or System.Uri	validation	error	refit, url, type-binding, attributes, design-time
Only one parameter can be a [Url] parameter	validation	error	refit, url, attributes, design-time