diff --git a/post.go b/post.go
index 450084b..8839ba8 100644
--- a/post.go
+++ b/post.go
@@ -1,147 +1,187 @@
 package writeas
 
 import (
 	"fmt"
 	"net/http"
 	"time"
 )
 
 type (
 	// Post represents a published Write.as post, whether anonymous, owned by a
 	// user, or part of a collection.
 	Post struct {
 		ID        string    `json:"id"`
 		Slug      string    `json:"slug"`
 		Token     string    `json:"token"`
 		Font      string    `json:"appearance"`
 		Language  *string   `json:"language"`
 		RTL       *bool     `json:"rtl"`
 		Listed    bool      `json:"listed"`
 		Created   time.Time `json:"created"`
 		Title     string    `json:"title"`
 		Content   string    `json:"body"`
 		Views     int64     `json:"views"`
 		Tags      []string  `json:"tags"`
 		Images    []string  `json:"images"`
 		OwnerName string    `json:"owner,omitempty"`
 
 		Collection *Collection `json:"collection,omitempty"`
 	}
 
+	// OwnedPostParams are, together, fields only the original post author knows.
+	OwnedPostParams struct {
+		ID    string `json:"-"`
+		Token string `json:"token,omitempty"`
+	}
+
 	// PostParams holds values for creating or updating a post.
 	PostParams struct {
 		// Parameters only for updating
-		ID    string `json:"-"`
-		Token string `json:"token,omitempty"`
+		OwnedPostParams
 
 		// Parameters for creating or updating
 		Title    string  `json:"title,omitempty"`
 		Content  string  `json:"body,omitempty"`
 		Font     string  `json:"font,omitempty"`
 		IsRTL    *bool   `json:"rtl,omitempty"`
 		Language *string `json:"lang,omitempty"`
 
 		Crosspost []map[string]string `json:"crosspost,omitempty"`
 	}
+
+	ClaimPostResult struct {
+		ID           string `json:"id,omitempty"`
+		Code         int    `json:"code,omitempty"`
+		ErrorMessage string `json:"error_msg,omitempty"`
+		Post         *Post  `json:"post,omitempty"`
+	}
 )
 
 // GetPost retrieves a published post, returning the Post and any error (in
 // user-friendly form) that occurs. See
 // https://writeas.github.io/docs/#retrieve-a-post.
 func (c *Client) GetPost(id string) (*Post, error) {
 	p := &Post{}
 	env, err := c.get(fmt.Sprintf("/posts/%s", id), p)
 	if err != nil {
 		return nil, err
 	}
 
 	var ok bool
 	if p, ok = env.Data.(*Post); !ok {
 		return nil, fmt.Errorf("Wrong data returned from API.")
 	}
 	status := env.Code
 
 	if status == http.StatusOK {
 		return p, nil
 	} else if status == http.StatusNotFound {
 		return nil, fmt.Errorf("Post not found.")
 	} else if status == http.StatusGone {
 		return nil, fmt.Errorf("Post unpublished.")
 	} else {
 		return nil, fmt.Errorf("Problem getting post: %s. %v\n", status, err)
 	}
 	return p, nil
 }
 
 // CreatePost publishes a new post, returning a user-friendly error if one comes
 // up. See https://writeas.github.io/docs/#publish-a-post.
 func (c *Client) CreatePost(sp *PostParams) (*Post, error) {
 	p := &Post{}
 	env, err := c.post("/posts", sp, p)
 	if err != nil {
 		return nil, err
 	}
 
 	var ok bool
 	if p, ok = env.Data.(*Post); !ok {
 		return nil, fmt.Errorf("Wrong data returned from API.")
 	}
 
 	status := env.Code
 	if status == http.StatusCreated {
 		return p, nil
 	} else if status == http.StatusBadRequest {
 		return nil, fmt.Errorf("Bad request: %s", env.ErrorMessage)
 	} else {
 		return nil, fmt.Errorf("Problem getting post: %s. %v\n", status, err)
 	}
 	return p, nil
 }
 
 // UpdatePost updates a published post with the given PostParams. See
 // https://writeas.github.io/docs/#update-a-post.
 func (c *Client) UpdatePost(sp *PostParams) (*Post, error) {
 	p := &Post{}
 	env, err := c.put(fmt.Sprintf("/posts/%s", sp.ID), sp, p)
 	if err != nil {
 		return nil, err
 	}
 
 	var ok bool
 	if p, ok = env.Data.(*Post); !ok {
 		return nil, fmt.Errorf("Wrong data returned from API.")
 	}
 
 	status := env.Code
 	if status == http.StatusOK {
 		return p, nil
 	} else if c.isNotLoggedIn(status) {
 		return nil, fmt.Errorf("Not authenticated.")
 	} else if status == http.StatusBadRequest {
 		return nil, fmt.Errorf("Bad request: %s", env.ErrorMessage)
 	} else {
 		return nil, fmt.Errorf("Problem getting post: %s. %v\n", status, err)
 	}
 	return p, nil
 }
 
 // DeletePost permanently deletes a published post. See
 // https://writeas.github.io/docs/#delete-a-post.
 func (c *Client) DeletePost(sp *PostParams) error {
 	env, err := c.delete(fmt.Sprintf("/posts/%s", sp.ID), map[string]string{
 		"token": sp.Token,
 	})
 	if err != nil {
 		return err
 	}
 
 	status := env.Code
 	if status == http.StatusNoContent {
 		return nil
 	} else if c.isNotLoggedIn(status) {
 		return fmt.Errorf("Not authenticated.")
 	} else if status == http.StatusBadRequest {
 		return fmt.Errorf("Bad request: %s", env.ErrorMessage)
 	}
 	return fmt.Errorf("Problem getting post: %s. %v\n", status, err)
 }
+
+// ClaimPosts associates anonymous posts with a user / account.
+// https://writeas.github.io/docs/#claim-posts.
+func (c *Client) ClaimPosts(sp *[]OwnedPostParams) (*[]ClaimPostResult, error) {
+	p := &[]ClaimPostResult{}
+	env, err := c.put("/posts/claim", sp, p)
+	if err != nil {
+		return nil, err
+	}
+
+	var ok bool
+	if p, ok = env.Data.(*[]ClaimPostResult); !ok {
+		return nil, fmt.Errorf("Wrong data returned from API.")
+	}
+
+	status := env.Code
+	if status == http.StatusOK {
+		return p, nil
+	} else if c.isNotLoggedIn(status) {
+		return nil, fmt.Errorf("Not authenticated.")
+	} else if status == http.StatusBadRequest {
+		return nil, fmt.Errorf("Bad request: %s", env.ErrorMessage)
+	} else {
+		return nil, fmt.Errorf("Problem getting post: %s. %v\n", status, err)
+	}
+	// TODO: does this also happen with moving posts?
+	return p, nil
+}