token-broker-client — consume brokered credentials
The primitive lives at lib/api/broker/ (contract: its FEATURE.md; cross-repo system of record: ../common-docs/systems/architecture/token-broker/FEATURE.md). It is complete — consume it; never hand-roll a mint call, credential cache, or gateway fetch.
Decision gate — does the server support the audience?
Check KNOWN_AUDIENCES in lib/api/broker/types.ts and the live minter registry (aidream services/token_broker/minters/).
- Supported → consume through the primitive (below). Zero broker-infrastructure code.
- NOT supported (new provider/capability) → STOP client-side. The system grows server-first: follow the global
token-broker skill (~/.claude/skills/token-broker/SKILL.md) — one minter + one registry line in aidream — then consume here through the unchanged primitive. Never work around a missing audience with client-side key handling.
How to consume
import { brokeredFetch, resolveBrokeredTransport } from "@/lib/api/broker/transport";
import { useBrokeredCredential } from "@/lib/api/broker/hooks";
// Proxied audience (e.g. "anthropic") — provider-wire HTTP, streaming included:
const res = await brokeredFetch(
{ audience: "anthropic", tierPolicy: "none", model: "claude-sonnet-5" },
"/v1/messages",
{ method: "POST", body: JSON.stringify(anthropicShapedBody) },
);
// Native audience (e.g. "openai_realtime") — connect directly per protocol:
const t = await resolveBrokeredTransport({ audience: "openai_realtime", tierPolicy: "none" });
if (t.mode === "native_ephemeral") connectRealtime(t.endpoint, t.token);
// Component that needs a continuously-fresh credential:
const { credential, status, error, refresh } = useBrokeredCredential(req);
Caching, in-flight dedup, refresh-ahead (<20% TTL), 401→one-re-mint, and sign-out clearing all happen inside the primitive — callers never manage credential lifetime.
Non-negotiables
tierPolicy is explicit at every callsite ("none" | "guest" | "mid"). Never add a default, wrapper-with-default, or omittable param.
- Never persist or log a token. Memory only. Never render
credential.token — mask it (debug UIs use useBrokerCacheSnapshot, masked).
- Never hardcode a gateway/provider URL —
credential.endpoint is the only source.
- No provider key in client env (
NEXT_PUBLIC_* or otherwise). Finding one is a defect: replace it with a broker audience (server-first).
- 503 on mint = loud error ("broker unconfigured"), never a silent fallback auth path, never a retry loop.
Verify
Demo page /demos/token-broker (dev builds): mint per audience, cache inspector, live proxied Anthropic call, forced re-mint.