Measured 2026-10-11 19:04 UTC. Last transaction input read 2026-10-11 17:03 UTC. Value summed per row and per transaction agree: yes.
What a Builder Code is
An app that builds a transaction on Base can append a short tag to the end of the calldata: the code, its length, a schema byte and a fixed 16-byte marker (ERC-8021). Base's attribution reads the tag to credit the app. We read the same bytes on every counted agent payment we can, highest value first, and store the code on the row. The result is a way to group agent money by the app that sent it without guessing who the app is: the registry's public metadata names no one for most codes, so the codes are shown as codes. The one we can name is our own, bc_yqx4j4qp, attached to Desk plan payments since 11 October 2026.
A payment with no code was built by an app that did not append one, by a wallet, or by a script; absence says nothing about the app. Definition: pay.builder.attribution.v1. The document behind this page: /api/builders.
Registered codes, by counted value
Share is of all attributed value. "Agents" is the number of distinct paying agents under the code's largest variant; "payees" the distinct addresses paid; "top payee" the share of the code's value that went to its single largest payee (a code that pays one contract is one app's own flow, a code spread over many payees is a wallet or a marketplace). "Last 7 days" counts payments and value since a week ago at measurement time.
| # | code | value | share | payments | agents | payees | top payee | first seen | last seen | last 7 days |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | bc_doqm1bei |
$3,849,697 | 90.7% | 1,546 | 256 | 7 | 98.9% | 2026-08-06 | 2026-10-11 | 158 · $405,095 |
| 2 | bc_r9qzf8op |
$113,248 | 2.7% | 555 | 111 | 86 | 16.0% | 2026-03-08 | 2026-10-11 | 39 · $8,798 |
| 3 | bc_scxiima9 +4 tags |
$110,173 | 2.6% | 1,824 | 23 | 1 | 100.0% | 2026-02-28 | 2026-10-11 | 91 · $3,883 |
| 4 | bc_tpolfjho |
$53,840 | 1.3% | 1,009 | 37 | 3 | 70.0% | 2026-04-26 | 2026-09-28 | – |
| 5 | bc_oad79faa |
$24,714 | 0.6% | 140 | 9 | 14 | 44.1% | 2026-02-26 | 2026-09-18 | – |
| 6 | bc_r7yhais5 |
$20,023 | 0.5% | 135 | 38 | 8 | 97.8% | 2026-02-18 | 2026-10-07 | 4 · $21 |
| 7 | bc_youcterf |
$12,087 | 0.3% | 9 | 2 | 2 | 87.6% | 2026-03-04 | 2026-07-05 | – |
| 8 | bc_hm64q4jm |
$7,752 | 0.2% | 115 | 37 | 2 | 73.9% | 2026-10-06 | 2026-10-11 | 115 · $7,752 |
| 9 | bc_pj3fz4w7 |
$5,512 | 0.1% | 45 | 15 | 13 | 39.9% | 2026-04-22 | 2026-09-13 | – |
| 10 | bc_yidatp2g |
$5,226 | 0.1% | 91 | 2 | 3 | 67.6% | 2026-06-24 | 2026-10-10 | 6 · $332 |
| 11 | bc_rd8s0npa |
$5,154 | 0.1% | 176 | 39 | 2 | 98.7% | 2026-05-06 | 2026-10-09 | 2 · $399 |
| 12 | bc_t5chwytk |
$5,098 | 0.1% | 73 | 21 | 24 | 29.9% | 2026-09-16 | 2026-10-10 | 21 · $1,572 |
| 13 | bc_nhvgty8t |
$4,599 | 0.1% | 455 | 17 | 79 | 54.5% | 2026-04-27 | 2026-10-11 | 25 · $192 |
| 14 | bc_julg9gbq |
$4,304 | 0.1% | 50 | 1 | 9 | 47.3% | 2026-07-14 | 2026-10-04 | – |
| 15 | bc_l4vqaa9e |
$2,786 | 0.1% | 34 | 11 | 7 | 53.8% | 2026-06-30 | 2026-09-27 | – |
| 16 | bc_camnko4g |
$2,500 | 0.1% | 1 | 1 | 1 | 100.0% | 2026-02-26 | 2026-02-26 | – |
| 17 | bc_u3g3444p |
$2,165 | 0.1% | 18 | 8 | 1 | 100.0% | 2026-06-24 | 2026-09-20 | – |
| 18 | bc_92yf9czs |
$1,962 | 0.1% | 22 | 6 | 4 | 94.2% | 2026-07-06 | 2026-08-06 | – |
| 19 | bc_4raffiaj |
$1,772 | 0.0% | 20 | 12 | 3 | 92.8% | 2026-07-15 | 2026-08-24 | – |
| 20 | bc_rvetawt5 |
$1,612 | 0.0% | 24 | 13 | 8 | 31.7% | 2026-08-10 | 2026-10-07 | 4 · $308 |
| 21 | bc_zgzef186 |
$1,231 | 0.0% | 41 | 9 | 18 | 20.1% | 2026-02-05 | 2026-08-23 | – |
| 22 | bc_ctejvoov |
$900 | 0.0% | 2 | 1 | 1 | 100.0% | 2026-09-14 | 2026-09-24 | – |
| 23 | bc_ipu1jetp |
$852 | 0.0% | 10 | 2 | 4 | 69.7% | 2026-03-10 | 2026-08-04 | – |
| 24 | bc_480ypir7 |
$797 | 0.0% | 60 | 10 | 8 | 52.4% | 2026-06-17 | 2026-08-25 | – |
| 25 | bc_avd0l2dd |
$778 | 0.0% | 37 | 8 | 4 | 84.3% | 2026-04-29 | 2026-05-29 | – |
| 26 | bc_jnz0sz8z |
$655 | 0.0% | 5 | 1 | 1 | 100.0% | 2026-09-29 | 2026-10-10 | 3 · $313 |
| 27 | bc_vf6cwk6h |
$615 | 0.0% | 111 | 1 | 1 | 100.0% | 2026-05-07 | 2026-08-11 | – |
| 28 | bc_i85qhgg2 |
$532 | 0.0% | 41 | 3 | 9 | 40.6% | 2026-08-18 | 2026-10-06 | 7 · $88 |
| 29 | bc_4iovi1yy |
$348 | 0.0% | 16 | 1 | 7 | 39.2% | 2026-07-17 | 2026-07-22 | – |
| 30 | bc_b83zsgn0 |
$330 | 0.0% | 6 | 4 | 2 | 53.9% | 2026-09-12 | 2026-09-28 | – |
| 31 | bc_nlhvsi52 |
$291 | 0.0% | 13 | 8 | 4 | 52.0% | 2026-05-09 | 2026-10-04 | 1 · $20 |
| 32 | bc_9ixiqtey |
$205 | 0.0% | 3 | 1 | 3 | 55.4% | 2026-10-04 | 2026-10-09 | 3 · $205 |
| 33 | bc_di3pknj1 |
$185 | 0.0% | 37 | 2 | 1 | 100.0% | 2026-04-27 | 2026-08-24 | – |
| 34 | bc_exqaso18 |
$165 | 0.0% | 3 | 3 | 1 | 100.0% | 2026-09-08 | 2026-10-04 | – |
| 35 | bc_onpde6mu |
$150 | 0.0% | 10 | 3 | 4 | 64.7% | 2026-09-17 | 2026-10-06 | 1 · $4 |
| 36 | bc_5jcus08a |
$118 | 0.0% | 23 | 6 | 14 | 25.4% | 2026-03-02 | 2026-05-31 | – |
| 37 | bc_nbn6qkni |
$110 | 0.0% | 2 | 2 | 1 | 100.0% | 2026-05-30 | 2026-06-10 | – |
| 38 | bc_wn1fm95i |
$106 | 0.0% | 14 | 2 | 5 | 58.5% | 2026-09-08 | 2026-09-23 | – |
| 39 | bc_kj26kx76 |
$100 | 0.0% | 24 | 1 | 1 | 100.0% | 2026-02-20 | 2026-02-23 | – |
| 40 | bc_9y2g1ceu |
$94 | 0.0% | 4 | 1 | 4 | 34.0% | 2026-04-03 | 2026-08-27 | – |
| 41 | bc_s3j5vf7h |
$80 | 0.0% | 11 | 3 | 1 | 100.0% | 2026-09-02 | 2026-09-06 | – |
| 42 | bc_hzjzr9nv |
$80 | 0.0% | 4 | 1 | 4 | 43.8% | 2026-09-29 | 2026-10-06 | 1 · $35 |
| 43 | bc_hr8binqm |
$79 | 0.0% | 7 | 6 | 2 | 94.9% | 2026-06-23 | 2026-09-21 | – |
| 44 | bc_582md4io |
$78 | 0.0% | 1 | 1 | 1 | 100.0% | 2026-09-24 | 2026-09-24 | – |
| 45 | bc_yhhltdnc |
$67 | 0.0% | 13 | 1 | 4 | 33.2% | 2026-09-28 | 2026-10-10 | 8 · $32 |
| 46 | bc_60exfq1d |
$36 | 0.0% | 2 | 2 | 2 | 70.9% | 2026-05-26 | 2026-09-11 | – |
| 47 | bc_p54y774f |
$21 | 0.0% | 2 | 2 | 1 | 100.0% | 2026-08-04 | 2026-08-28 | – |
| 48 | bc_lfbayxwx |
$20 | 0.0% | 5 | 2 | 1 | 100.0% | 2026-09-10 | 2026-09-10 | – |
| 49 | bc_qsurd2pa |
$20 | 0.0% | 1 | 1 | 1 | 100.0% | 2026-07-21 | 2026-07-21 | – |
| 50 | bc_7qp6nz9w |
$18 | 0.0% | 1 | 1 | 1 | 100.0% | 2026-08-05 | 2026-08-05 | – |
| 51 | bc_6b7scuim |
$13 | 0.0% | 1 | 1 | 1 | 100.0% | 2026-08-23 | 2026-08-23 | – |
| 52 | bc_by8j7h2o |
$10 | 0.0% | 1 | 1 | 1 | 100.0% | 2026-10-09 | 2026-10-09 | 1 · $10 |
| 53 | bc_q52is5ye |
$8 | 0.0% | 1 | 1 | 1 | 100.0% | 2026-09-07 | 2026-09-07 | – |
| 54 | bc_e25smadr |
$5 | 0.0% | 1 | 1 | 1 | 100.0% | 2026-09-14 | 2026-09-14 | – |
| 55 | bc_52j000yi |
$5 | 0.0% | 1 | 1 | 1 | 100.0% | 2026-05-02 | 2026-05-02 | – |
| 56 | bc_0f6inod1 |
$4 | 0.0% | 1 | 1 | 1 | 100.0% | 2026-03-10 | 2026-03-10 | – |
Suffixes that are not a registered code
The marker was present but the bytes before it are not a bc_ code: another schema this reader does not decode, free text an app put there, or bytes that are not printable. They are counted and shown so the attributed total is not quietly smaller than what carries the marker.
| suffix | kind | value | payments | agents | first seen | last seen |
|---|---|---|---|---|---|---|
schema:2 |
other schema | $1,202 | 54 | 23 | 2026-06-17 | 2026-10-03 |
6a8780bbddcaae5e9cdba49b |
unregistered text | $550 | 2 | 1 | 2026-08-29 | 2026-08-29 |
uULhrcTU9EDF |
unregistered text | $271 | 5 | 4 | 2026-07-11 | 2026-09-07 |
unparsed |
unparsed | $23 | 2 | 1 | 2026-07-10 | 2026-07-12 |
How to read this page
- Coverage runs ahead by value. Transactions are read highest value first, so almost all counted value has been read while a large share of small payments has not. The two coverage figures above are both shown for that reason.
- One code dominates. The largest code carries most of the attributed value and most of the agents; it is an app many agents pay through, not one agent. Which app it is, the registry does not say and we do not guess.
- Codes with tags. ERC-8021 lets an app add its own sub-tags after the code (a wallet, a surface). They are folded into the registered code above and counted in the "+tags" note; the raw strings are in the document.
- This is not a ranking of apps. Agents that pay through apps without a code are invisible here by construction. It is the attribution Base itself reads, measured on the counted agent-payment set.