# Capability namespaces (/integration-guides/capability-namespaces)



`In progress`

Capability namespaces let facilitators ask for a specific validation artifact without coupling the payment route to one attestor. The ValidationRegistry stores the namespace and the attestation PDA stores the capability hash.

| Source               | Path                                                                                                                                                                                                 |
| -------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| namespace state      | [`programs/validation-registry/src/state/capability_namespace.rs`](https://github.com/agenttrust-labs/agenttrust/blob/main/programs/validation-registry/src/state/capability_namespace.rs)           |
| register instruction | [`programs/validation-registry/src/instructions/register_namespace.rs`](https://github.com/agenttrust-labs/agenttrust/blob/main/programs/validation-registry/src/instructions/register_namespace.rs) |
| x402 header          | [`trustgate/sdk/src/x402.ts`](https://github.com/agenttrust-labs/agenttrust/blob/main/trustgate/sdk/src/x402.ts)                                                                                     |