oauth_pkce
OAuth 2.0 PKCE helper (RFC 7636 / OAuth 2.1): generate a code_verifier with its S256 code_challenge plus random state and OIDC nonce, verify that a verifier matches a challenge, or build a complete authorization URL (response_type=code, client_id, redirect_uri, scope, state, nonce, code_challenge...
This record as markdown: /tools/com-it-scorptech-x402/oauth-pkce.md
What oauth_pkce does on ScorpTech x402 API
AI agents invoke oauth_pkce to trigger actions in ScorpTech x402 API. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.
| Parameter | Type | Required | Description |
|---|---|---|---|
mode | string | — | |
extra | object | — | authorize-url: additional query parameters, e.g. {"prompt": "consent", "audience": "api"} |
scope | string | — | |
state | string | — | authorize-url: state to use (default: random) |
length | integer | — | generate: verifier length |
method | string | — | |
clientId | string | — | |
verifier | string | — | |
challenge | string | — | |
redirectUri | string | — | |
responseType | string | — | |
authorizationEndpoint | string | — |
Parameters from the server's own tool schema.
Why oauth_pkce is rated High
oauth_pkce triggers real processes with real consequences. An agent gone sideways doesn't fire it once. It starts dozens of builds, sends mass notifications, or burns through compute before anyone looks up.
Risk signalsHigh parameter count (12 properties)
Attacks that exploit this kind of access
The rule that runs oauth_pkce safely
PolicyLayer is an MCP gateway: it sits between your AI agents and ScorpTech x402 API, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For oauth_pkce, this is the rule to start with:
oauth_pkce stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect ScorpTech x402 API, apply this rule, and every oauth_pkce call is checked against it from then on.
Questions about oauth_pkce
OAuth 2.0 PKCE helper (RFC 7636 / OAuth 2.1): generate a code_verifier with its S256 code_challenge plus random state and OIDC nonce, verify that a verifier matches a challenge, or build a complete authorization URL (response_type=code, client_id, redirect_uri, scope, state, nonce, code_challenge, extra parameters such as prompt or audience) and return the verifier / state to keep for the token exchange. Validates verifier length and characters and redirect URIs. Price: $0.001 USDC per successful call (x402, Solana). Same tool over HTTPS: POST https://scorptech.it.com/api/x402/v1/oauth-pkce. It is categorised as a Execute tool in the ScorpTech x402 API MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
oauth_pkce accepts 12 parameters: mode, extra, scope, state, length, method, clientId, verifier, challenge, redirectUri, responseType, authorizationEndpoint. The full parameter table on this page comes from the server's own tool schema.
Register the ScorpTech x402 API MCP server in PolicyLayer and add a rule for oauth_pkce: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches ScorpTech x402 API. Nothing to install.
oauth_pkce is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the oauth_pkce rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for oauth_pkce. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
oauth_pkce is provided by the ScorpTech x402 API MCP server (https://scorptech.it.com/api/x402/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
More on ScorpTech x402 API, and thousands of servers like it.
Across the catalogue