diff --git a/bin/onlyoffice/import-contact.go b/bin/onlyoffice/import-contact.go
index 2e3217d..889e265 100644
--- a/bin/onlyoffice/import-contact.go
+++ b/bin/onlyoffice/import-contact.go
@@ -1,25 +1,24 @@
 //usr/bin/env go run "$0" "$@"; exit
+//
 // bin/onlyoffice/import-contact.go - read address-book files and reconcile
 // each contact into the OnlyOffice CRM (best effort; skip existing by email).
 //
-//	OO_URL=… OO_USER=… OO_PASSWORD=… ./bin/onlyoffice/import-contact.go --sources a.csv
+//	ONLYOFFICE_URL/USER/PASS ./bin/onlyoffice/import-contact.go --sources a.csv
 //	./bin/onlyoffice/import-contact.go --sources dir/ --dry-run
+//
+// Uses the go-onlyoffice library client (FindPersonByEmail is idempotent:
+// matches commonData emails, so re-runs never duplicate).
 package main
 
 import (
 	"context"
-	"encoding/json"
 	"fmt"
-	"io"
-	"net/http"
-	"net/http/cookiejar"
-	"net/url"
 	"os"
 	"strings"
-	"time"
 
 	"github.com/eSlider/2dph/pkg/cli"
 	"github.com/eSlider/2dph/pkg/contact"
+	"github.com/eslider/go-onlyoffice"
 )
 
 func main() {
@@ -45,8 +44,8 @@ func run(args []string) int {
 	var srcs []string
 	for _, s := range sources {
 		for _, part := range strings.Split(s, ",") {
-			if p := strings.TrimSpace(part); p != "" {
-				srcs = append(srcs, p)
+			if part = strings.TrimSpace(part); part != "" {
+				srcs = append(srcs, part)
 			}
 		}
 	}
@@ -60,98 +59,41 @@ func run(args []string) int {
 	if dryRun {
 		return 0
 	}
-	created, matched, failed, err := writeOO(context.Background(), cs)
-	if err != nil {
-		fmt.Fprintf(os.Stderr, "onlyoffice-import-contact: %v\n", err)
-		return 1
-	}
-	fmt.Fprintf(os.Stderr, "oo: created=%d matched=%d failed=%d\n", created, matched, failed)
-	return 0
-}
-
-type ooConfig struct{ URL, User, Password string }
 
-type ooClient struct {
-	cfg    ooConfig
-	client *http.Client
-	token  string
-}
-
-func ooConfigFromEnv() (ooConfig, error) {
-	pick := func(a, b string) string {
-		if v := strings.TrimSpace(os.Getenv(a)); v != "" {
-			return v
-		}
-		return strings.TrimSpace(os.Getenv(b))
-	}
-	cfg := ooConfig{
-		URL:      pick("ONLYOFFICE_URL", "OO_URL"),
-		User:     pick("ONLYOFFICE_USER", "OO_USER"),
-		Password: pick("ONLYOFFICE_PASS", "OO_PASSWORD"),
-	}
-	if cfg.URL == "" || cfg.User == "" || cfg.Password == "" {
-		return cfg, fmt.Errorf("needs ONLYOFFICE_URL/USER/PASS (or OO_URL/USER/PASSWORD) env vars")
-	}
-	return cfg, nil
-}
-
-func newOOClient(cfg ooConfig) (*ooClient, error) {
-	jar, _ := cookiejar.New(nil)
-	c := &ooClient{cfg: cfg, client: &http.Client{Jar: jar, Timeout: 60 * time.Second}}
-	body, _ := json.Marshal(map[string]any{"userName": cfg.User, "password": cfg.Password, "type": 0})
-	resp, err := c.client.Post(strings.TrimRight(cfg.URL, "/")+"/api/2.0/authentication.json",
-		"application/json", strings.NewReader(string(body)))
-	if err != nil {
-		return nil, err
-	}
-	defer resp.Body.Close()
-	data, _ := io.ReadAll(io.LimitReader(resp.Body, 4<<20))
-	if resp.StatusCode < 200 || resp.StatusCode > 299 {
-		return nil, fmt.Errorf("oo authenticate status %d: %s", resp.StatusCode, truncate(string(data), 200))
-	}
-	var out struct {
-		Response struct {
-			Token string `json:"token"`
-		} `json:"response"`
-	}
-	if err := json.Unmarshal(data, &out); err != nil || out.Response.Token == "" {
-		return nil, fmt.Errorf("oo authenticate: empty token")
-	}
-	c.token = out.Response.Token
-	return c, nil
-}
-
-func writeOO(ctx context.Context, cs []contact.Contact) (created, matched, failed int, err error) {
-	cfg, err := ooConfigFromEnv()
-	if err != nil {
-		return 0, 0, 0, err
-	}
-	c, err := newOOClient(cfg)
-	if err != nil {
-		return 0, 0, 0, err
-	}
-	base := strings.TrimRight(cfg.URL, "/")
+	c := onlyoffice.NewClient(onlyoffice.GetEnvironmentCredentials())
+	ctx := context.Background()
+	var created, matched, failed int
 	for _, ct := range cs {
 		email := first(ct.Emails)
-		if _, found, ferr := c.findPersonByEmail(ctx, base, email); ferr != nil {
+		existing, err := c.FindPersonByEmail(ctx, email)
+		if err != nil {
 			failed++
-			fmt.Fprintf(os.Stderr, "oo lookup %q: %v\n", ct.DisplayName(), ferr)
+			fmt.Fprintf(os.Stderr, "oo lookup %q: %v\n", ct.DisplayName(), err)
 			continue
-		} else if found {
+		}
+		if existing != nil {
 			matched++
 			fmt.Fprintf(os.Stderr, "oo matched %q (%s)\n", ct.DisplayName(), email)
 			continue
 		}
-		pid, cerr := c.createPerson(ctx, base, ct)
-		if cerr != nil {
+		person, err := c.CreatePerson(ctx, ct.Given, ct.Family, 0, ct.Title, ct.Org)
+		if err != nil {
 			failed++
-			fmt.Fprintf(os.Stderr, "oo create %q: %v\n", ct.DisplayName(), cerr)
+			fmt.Fprintf(os.Stderr, "oo create %q: %v\n", ct.DisplayName(), err)
 			continue
 		}
+		id := fmt.Sprint(person["id"])
+		for i, e := range ct.Emails {
+			_, _ = c.AddContactInfo(ctx, id, "email", e, "Work", i == 0)
+		}
+		for _, ph := range ct.Phones {
+			_, _ = c.AddContactInfo(ctx, id, "phone", ph, "Work", false)
+		}
 		created++
-		fmt.Fprintf(os.Stderr, "oo created %q -> %s\n", ct.DisplayName(), pid)
+		fmt.Fprintf(os.Stderr, "oo created %q -> %s\n", ct.DisplayName(), id)
 	}
-	return created, matched, failed, nil
+	fmt.Fprintf(os.Stderr, "oo: created=%d matched=%d failed=%d\n", created, matched, failed)
+	return 0
 }
 
 func first(xs []string) string {
@@ -160,118 +102,3 @@ func first(xs []string) string {
 	}
 	return xs[0]
 }
-
-func (c *ooClient) findPersonByEmail(ctx context.Context, base, email string) (string, bool, error) {
-	if email == "" {
-		return "", false, nil
-	}
-	u := base + "/api/2.0/crm/contact/filter.json?search=" + url.QueryEscape(email)
-	var out struct {
-		Response []map[string]any `json:"response"`
-	}
-	if err := c.get(ctx, u, &out); err != nil {
-		return "", false, err
-	}
-	for _, row := range out.Response {
-		if isCompany(row) {
-			continue
-		}
-		for _, k := range []string{"email", "primaryEmail"} {
-			if strings.EqualFold(strings.TrimSpace(fmt.Sprint(row[k])), email) {
-				return fmt.Sprint(row["id"]), true, nil
-			}
-		}
-	}
-	return "", false, nil
-}
-
-func (c *ooClient) createPerson(ctx context.Context, base string, ct contact.Contact) (string, error) {
-	form := url.Values{}
-	form.Set("firstName", ct.Given)
-	form.Set("lastName", ct.Family)
-	if form.Get("firstName") == "" && form.Get("lastName") == "" {
-		form.Set("firstName", ct.DisplayName())
-	}
-	if ct.Title != "" {
-		form.Set("jobTitle", ct.Title)
-	}
-	if ct.Org != "" {
-		form.Set("about", ct.Org)
-	}
-	var out struct {
-		Response struct {
-			ID string `json:"id"`
-		} `json:"response"`
-	}
-	if err := c.postForm(ctx, base+"/api/2.0/crm/contact/person.json", form, &out); err != nil {
-		return "", err
-	}
-	id := out.Response.ID
-	for _, e := range ct.Emails {
-		_ = c.addContactInfo(ctx, base, id, "email", e, "Work", e == first(ct.Emails))
-	}
-	for _, p := range ct.Phones {
-		_ = c.addContactInfo(ctx, base, id, "phone", p, "Work", false)
-	}
-	return id, nil
-}
-
-func (c *ooClient) addContactInfo(ctx context.Context, base, id, infoType, data, category string, primary bool) error {
-	form := url.Values{}
-	form.Set("infoType", infoType)
-	form.Set("data", data)
-	form.Set("category", category)
-	form.Set("isPrimary", fmt.Sprint(primary))
-	var out any
-	return c.postForm(ctx, fmt.Sprintf("%s/api/2.0/crm/contact/%s/data.json", base, url.PathEscape(id)), form, &out)
-}
-
-func (c *ooClient) get(ctx context.Context, u string, out any) error {
-	req, err := http.NewRequestWithContext(ctx, http.MethodGet, u, nil)
-	if err != nil {
-		return err
-	}
-	req.Header.Set("Authorization", "Bearer "+c.token)
-	req.Header.Set("Accept", "application/json")
-	return c.do(req, out)
-}
-
-func (c *ooClient) postForm(ctx context.Context, u string, form url.Values, out any) error {
-	req, err := http.NewRequestWithContext(ctx, http.MethodPost, u, strings.NewReader(form.Encode()))
-	if err != nil {
-		return err
-	}
-	req.Header.Set("Authorization", "Bearer "+c.token)
-	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
-	req.Header.Set("Accept", "application/json")
-	return c.do(req, out)
-}
-
-func (c *ooClient) do(req *http.Request, out any) error {
-	resp, err := c.client.Do(req)
-	if err != nil {
-		return err
-	}
-	defer resp.Body.Close()
-	data, _ := io.ReadAll(io.LimitReader(resp.Body, 16<<20))
-	if resp.StatusCode < 200 || resp.StatusCode > 299 {
-		return fmt.Errorf("oo %s %s: status %d: %s", req.Method, req.URL.Path, resp.StatusCode, truncate(string(data), 300))
-	}
-	if out != nil {
-		return json.Unmarshal(data, out)
-	}
-	return nil
-}
-
-func isCompany(m map[string]any) bool {
-	v, ok := m["isCompany"].(bool)
-	return ok && v
-}
-
-func truncate(s string, n int) string {
-	s = strings.TrimSpace(s)
-	if len(s) <= n {
-		return s
-	}
-	return s[:n] + "..."
-}
diff --git a/go.mod b/go.mod
index 2d6cea4..46495af 100644
--- a/go.mod
+++ b/go.mod
@@ -8,6 +8,7 @@ require (
 	github.com/chewxy/math32 v1.11.2
 	github.com/daulet/tokenizers v1.27.0
 	github.com/duckdb/duckdb-go/v2 v2.10505.0
+	github.com/eslider/go-onlyoffice v0.13.0
 	github.com/go-git/go-git/v5 v5.19.2
 	github.com/integrii/flaggy v1.8.0
 	golang.org/x/sys v0.47.0
@@ -23,6 +24,7 @@ require (
 	github.com/clipperhouse/uax29/v2 v2.7.0 // indirect
 	github.com/fatih/color v1.19.0 // indirect
 	github.com/gogs/chardet v0.0.0-20211120154057-b7413eaefb8f // indirect
+	github.com/google/go-querystring v1.2.0 // indirect
 	github.com/inbucket/html2text v1.0.0 // indirect
 	github.com/mattn/go-colorable v0.1.14 // indirect
 	github.com/mattn/go-runewidth v0.0.23 // indirect
@@ -56,7 +58,7 @@ require (
 	github.com/goccy/go-json v0.10.6 // indirect
 	github.com/golang/groupcache v0.0.0-20241129210726-2c02b8208cf8 // indirect
 	github.com/google/flatbuffers v25.12.19+incompatible // indirect
-	github.com/google/uuid v1.6.0 // indirect
+	github.com/google/uuid v1.6.0
 	github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99 // indirect
 	github.com/jhillyerd/enmime/v2 v2.4.1
 	github.com/kevinburke/ssh_config v1.2.0 // indirect
@@ -74,7 +76,7 @@ require (
 	github.com/zeebo/xxh3 v1.1.0 // indirect
 	golang.org/x/crypto v0.53.0 // indirect
 	golang.org/x/exp v0.0.0-20260410095643-746e56fc9e2f // indirect
-	golang.org/x/net v0.56.0 // indirect
+	golang.org/x/net v0.56.0
 	gopkg.in/warnings.v0 v0.1.2 // indirect
 	modernc.org/libc v1.74.4 // indirect
 	modernc.org/mathutil v1.7.1 // indirect
diff --git a/go.sum b/go.sum
index 9774c05..b708dda 100644
--- a/go.sum
+++ b/go.sum
@@ -61,6 +61,8 @@ github.com/emersion/go-vcard v0.0.0-20260618161152-d854b7e0e2d3 h1:B9YK+Tck5mTcc
 github.com/emersion/go-vcard v0.0.0-20260618161152-d854b7e0e2d3/go.mod h1:HMJKR5wlh/ziNp+sHEDV2ltblO4JD2+IdDOWtGcQBTM=
 github.com/emirpasic/gods v1.18.1 h1:FXtiHYKDGKCW2KzwZKx0iC0PQmdlorYgdFG9jPXJ1Bc=
 github.com/emirpasic/gods v1.18.1/go.mod h1:8tpGGwCnJ5H4r6BWwaV6OrWmMoPhUl5jm/FMNAnJvWQ=
+github.com/eslider/go-onlyoffice v0.13.0 h1:VLRIz1I0KiiwSR6B+O5gpJDgXb67KXjJRUpoqw9Os2g=
+github.com/eslider/go-onlyoffice v0.13.0/go.mod h1:TdEl0Cd74CWSk4B1K4+okR+feGNYoCsTSt4Cecz8jGI=
 github.com/fatih/color v1.19.0 h1:Zp3PiM21/9Ld6FzSKyL5c/BULoe/ONr9KlbYVOfG8+w=
 github.com/fatih/color v1.19.0/go.mod h1:zNk67I0ZUT1bEGsSGyCZYZNrHuTkJJB+r6Q9VuMi0LE=
 github.com/gliderlabs/ssh v0.3.8 h1:a4YXD1V7xMF9g5nTkdfnja3Sxy1PVDCj1Zg4Wb8vY6c=
@@ -73,6 +75,8 @@ github.com/go-git/go-git-fixtures/v4 v4.3.2-0.20231010084843-55a94097c399 h1:eMj
 github.com/go-git/go-git-fixtures/v4 v4.3.2-0.20231010084843-55a94097c399/go.mod h1:1OCfN199q1Jm3HZlxleg+Dw/mwps2Wbk9frAWm+4FII=
 github.com/go-git/go-git/v5 v5.19.2 h1:wkfn7vOlUBu8ivAWKBWisTiwJK4jYHzTF8Ndv1LyGqY=
 github.com/go-git/go-git/v5 v5.19.2/go.mod h1:QqCBE1EFN5ddFmrliLQ3/ntRCUjZU3EJuwuB/jWEHjk=
+github.com/go-test/deep v1.1.1 h1:0r/53hagsehfO4bzD2Pgr/+RgHqhmf+k1Bpse2cTu1U=
+github.com/go-test/deep v1.1.1/go.mod h1:5C2ZWiW0ErCdrYzpqxLbTX7MG14M9iiw8DgHncVwcsE=
 github.com/go-viper/mapstructure/v2 v2.5.0 h1:vM5IJoUAy3d7zRSVtIwQgBj7BiWtMPfmPEgAXnvj1Ro=
 github.com/go-viper/mapstructure/v2 v2.5.0/go.mod h1:oJDH3BJKyqBA2TXFhDsKDGDTlndYOZ6rGS0BRZIxGhM=
 github.com/goccy/go-json v0.10.6 h1:p8HrPJzOakx/mn/bQtjgNjdTcN+/S6FcG2CTtQOrHVU=
@@ -83,8 +87,11 @@ github.com/golang/groupcache v0.0.0-20241129210726-2c02b8208cf8 h1:f+oWsMOmNPc8J
 github.com/golang/groupcache v0.0.0-20241129210726-2c02b8208cf8/go.mod h1:wcDNUvekVysuuOpQKo3191zZyTpiI6se1N1ULghS0sw=
 github.com/google/flatbuffers v25.12.19+incompatible h1:haMV2JRRJCe1998HeW/p0X9UaMTK6SDo0ffLn2+DbLs=
 github.com/google/flatbuffers v25.12.19+incompatible/go.mod h1:1AeVuKshWv4vARoZatz6mlQ0JxURH0Kv5+zNeJKJCa8=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
 github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
+github.com/google/go-querystring v1.2.0 h1:yhqkPbu2/OH+V9BfpCVPZkNmUXhb2gBxJArfhIxNtP0=
+github.com/google/go-querystring v1.2.0/go.mod h1:8IFJqpSRITyJ8QhQ13bmbeMBDfmeEJZD5A0egEOmkqU=
 github.com/google/pprof v0.0.0-20260802141513-ef3492d7dac3 h1:LMLX+LgTNWpfvCBdFebv6EsYotImrt/Ppc5cXIriCSo=
 github.com/google/pprof v0.0.0-20260802141513-ef3492d7dac3/go.mod h1:jl5iWTm0/hd5PjEYEOuwAJ57L/CibdZfrqZ5XA5GrCk=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=