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fix: use application/x-www-form-urlencoded for OAuth token requests #8

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fix: use application/x-www-form-urlencoded for OAuth token requests #8

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0dfc264
fix: use application/x-www-form-urlencoded for OAuth token requests
coleleavitt Dec 30, 2025
dd92e1e
fix: guard against undefined auth in loader
coleleavitt Dec 30, 2025
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9 changes: 5 additions & 4 deletions index.mjs
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Original file line number Diff line number Diff line change
Expand Up @@ -41,9 +41,9 @@ async function exchange(code, verifier) {
const result = await fetch("https://console.anthropic.com/v1/oauth/token", {
method: "POST",
headers: {
"Content-Type": "application/json",
"Content-Type": "application/x-www-form-urlencoded",
},
body: JSON.stringify({
body: new URLSearchParams({
code: splits[0],
state: splits[1],
grant_type: "authorization_code",
Expand Down Expand Up @@ -74,6 +74,7 @@ export async function AnthropicAuthPlugin({ client }) {
provider: "anthropic",
async loader(getAuth, provider) {
const auth = await getAuth();
if (!auth) return {};
if (auth.type === "oauth") {
// zero out cost for max plan
for (const model of Object.values(provider.models)) {
Expand Down Expand Up @@ -101,9 +102,9 @@ export async function AnthropicAuthPlugin({ client }) {
{
method: "POST",
headers: {
"Content-Type": "application/json",
"Content-Type": "application/x-www-form-urlencoded",
},
body: JSON.stringify({
body: new URLSearchParams({
grant_type: "refresh_token",
refresh_token: auth.refresh,
client_id: CLIENT_ID,
Expand Down