diff --git a/README.md b/README.md
index 7bb6ddf..1fa6b06 100644
--- a/README.md
+++ b/README.md
@@ -116,6 +116,7 @@ client.payments.submit_by_hash(rail0_id, "capture", { transaction_hash: "0x…"
 | `refund_prepare` (phase 1+2) + `refund` | payee | Return captured funds to the payer via EIP-3009 |
 | `dispute_prepare` + `dispute` | payer | Open a dispute (signal-only) |
 | `close_dispute_prepare` + `close_dispute` | payer | Close an open dispute |
+| `dispute_submit_by_hash` / `close_dispute_submit_by_hash` | payer | Report a dispute tx the wallet already broadcast |
 
 **Payment statuses:** `unsigned`, `signed`, `authorized`, `charged`, `captured`,
 `partially_captured`, `voided`, `released`, `refunded` — plus `partially_refunded`,
@@ -140,6 +141,12 @@ Two role rules are worth knowing before the first call, because both surface as
   **payee-only**, while `release` and the prepare steps accept either participant,
   and `dispute`/`close_dispute` submits are **payer-only**.
 
+A wallet that signs *and broadcasts* in one step (MetaMask) reports the result by hash
+instead of handing over a signed transaction: `submit_by_hash` covers the merchant
+operations, and the two dispute paths have their own payer-only methods
+(`dispute_submit_by_hash`, `close_dispute_submit_by_hash`) because `dispute/close` is two
+path segments and does not fit the generic shape.
+
 ```ruby
 auth = client.auth.login(private_key: "0x…", domain: "api.rail0.xyz")
 # => { token:, address:, account_id:, name:, expires_at: }
@@ -167,8 +174,15 @@ Lower-level building blocks are also available:
 ```ruby
 nonce   = client.auth.nonce                                  # POST /auth/nonces
 session = client.auth.verify(message: siwe_msg, signature: sig)  # POST /auth
+client.auth.logout                                           # POST /auth/logout
 ```
 
+`logout` revokes **the token this client carries**, not every session for the address —
+signing out one process leaves the others signed in. Read the answer: the gateway's
+denylist **fails open** by design (a store outage must not sign out the whole platform),
+so `{ revoked: false }` means the token is *still usable* until it expires, and the
+caller should treat its own copy as compromised rather than assume the session is gone.
+
 ## Catalog (public)
 
 ```ruby
diff --git a/lib/rail0/resources/auth.rb b/lib/rail0/resources/auth.rb
index 32f4e2a..9ac19c9 100644
--- a/lib/rail0/resources/auth.rb
+++ b/lib/rail0/resources/auth.rb
@@ -35,6 +35,24 @@ def verify(message:, signature:)
         http.post("/auth", { message: message, signature: signature })
       end
 
+      # End the session whose token this client carries.
+      #
+      # Per TOKEN, not per address: signing out one process leaves the others signed in.
+      # Requires the session it revokes, so the client must be holding one — a client
+      # built without a token gets a 401 rather than a silent no-op.
+      #
+      # `revoked` is the OUTCOME, not a formality, and the reason this returns the body
+      # instead of nil. The gateway's denylist fails open by design — a store outage must
+      # not sign out the whole platform — so `false` means the token is STILL USABLE until
+      # its own expiry, and a caller should treat its copy as compromised rather than
+      # assume the session is gone. rail0-go and rail0-ts have had this; Ruby was the one
+      # SDK where a long-lived process could not hand a session back. (#19)
+      #
+      # @return [Hash] { revoked: true|false }
+      def logout
+        http.post("/auth/logout", {})
+      end
+
       # Perform the full SIWE authentication flow:
       #   1. Fetch a nonce
       #   2. Build an EIP-4361 message via siwe-rb
diff --git a/lib/rail0/resources/payments.rb b/lib/rail0/resources/payments.rb
index 5fa396c..58ffd7d 100644
--- a/lib/rail0/resources/payments.rb
+++ b/lib/rail0/resources/payments.rb
@@ -254,6 +254,32 @@ def close_dispute(id, params)
         http.post("/payments/#{id}/dispute/close", params)
       end
 
+      # The payer's counterpart to {#submit_by_hash}, which covers only the operations
+      # under /payments/{id}/{operation}/submitted — the two dispute paths are not shaped
+      # that way (`dispute/close` is two segments), so they need their own methods. Both
+      # exist in rail0-go and rail0-ts; without them a Ruby caller signing with a wallet
+      # that broadcasts on its own (MetaMask) could open and close disputes with a raw
+      # signed transaction, but never report one it had already sent. (#19)
+      #
+      # Payer-only, and the payer authenticates account-less via SIWE: a bare hash
+      # carries no signature, so the session is what proves who is reporting it.
+
+      # Report an already-broadcast dispute transaction by hash (payer only); HTTP 202.
+      # @param id [String] Payment UUID or rail0_id.
+      # @param params [Hash] { transaction_hash: "0x…" }.
+      # @return [Hash]
+      def dispute_submit_by_hash(id, params)
+        http.post("/payments/#{id}/dispute/submitted", params)
+      end
+
+      # Report an already-broadcast close-dispute transaction by hash (payer only); HTTP 202.
+      # @param id [String] Payment UUID or rail0_id.
+      # @param params [Hash] { transaction_hash: "0x…" }.
+      # @return [Hash]
+      def close_dispute_submit_by_hash(id, params)
+        http.post("/payments/#{id}/dispute/close/submitted", params)
+      end
+
       private
 
       def prepare_dispute(path, id, reason)
diff --git a/spec/client_spec.rb b/spec/client_spec.rb
index 2432f8f..fb9f266 100644
--- a/spec/client_spec.rb
+++ b/spec/client_spec.rb
@@ -126,6 +126,23 @@ def stub_patch(path, body, status: 200)
     end
   end
 
+  describe "auth.logout" do
+    it "POSTs /auth/logout and returns the revocation outcome" do
+      stub = stub_post("/auth/logout", { revoked: true })
+      result = client.auth.logout
+      expect(stub).to have_been_requested
+      expect(result[:revoked]).to be(true)
+    end
+
+    it "reports revoked: false rather than treating it as success" do
+      # The gateway's denylist fails open by design — a store outage must not sign out
+      # the whole platform — so false means the token is STILL USABLE until it expires.
+      # Swallowing it would tell a caller its session is gone when it is not.
+      stub_post("/auth/logout", { revoked: false })
+      expect(client.auth.logout[:revoked]).to be(false)
+    end
+  end
+
   describe "auth.login" do
     let(:key) { "0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80" }
 
@@ -394,6 +411,24 @@ def stub_authed_get(token)
     end
   end
 
+  describe "payments dispute report-by-hash" do
+    # The payer's counterpart to submit_by_hash, which only covers the single-segment
+    # /payments/{id}/{operation}/submitted shape — `dispute/close` is two segments, which
+    # is why these need their own methods rather than an operation argument.
+    it "reports a broadcast dispute by hash" do
+      stub = stub_post("/payments/#{PAYMENT_ID}/dispute/submitted", { status: "submitted" }, status: 202)
+      result = client.payments.dispute_submit_by_hash(PAYMENT_ID, { transaction_hash: "0x#{'ab' * 32}" })
+      expect(stub).to have_been_requested
+      expect(result[:status]).to eq("submitted")
+    end
+
+    it "reports a broadcast close-dispute by hash on the two-segment path" do
+      stub = stub_post("/payments/#{PAYMENT_ID}/dispute/close/submitted", { status: "submitted" }, status: 202)
+      client.payments.close_dispute_submit_by_hash(PAYMENT_ID, { transaction_hash: "0x#{'cd' * 32}" })
+      expect(stub).to have_been_requested
+    end
+  end
+
   describe "payments.disputes" do
     it "lists a payment's dispute history" do
       stub_list("/payments/#{PAYMENT_ID}/disputes?status=open", [DISPUTE])