<p><a href="http://chain.com/docs" rel="nofollow">Chain.com</a> offers OP_RETURN data for addresses, transactions and blocks.</p>

CC BY-SA 3.0
2014-08-20T20:25:52.850Z
While this link may answer the question, it is better to include the essential parts of the answer here and provide the link for reference.  Link-only answers can become invalid if the linked page changes.
cdecker
CC BY-SA 3.0
2014-08-29T10:35:13.460Z
@cdecker: This post seems to be providing a matching though brief answer to the question. I'd say rather the question is at fault than the answer.
Murch
CC BY-SA 3.0
2014-08-14T02:58:25.833Z
2014-08-14T02:58:25.833Z
Charley Hine
<p>You can use the <a href="http://api.coinsecrets.org/" rel="nofollow">Coin Secrets API</a> to obtain the OP_RETURN transactions in each block though it does not yet have a regex feature.</p>

CC BY-SA 3.0
2015-07-16T07:38:49.800Z
2015-07-16T07:38:49.800Z
Gideon Greenspan
<p>Is there a webservice around that allows one to search the OP_RETURN data on the blockchain? More precisely: I'm looking for a service that would return the transaction ids of transactions that contain an OP_RETURN with data that matches the given expression.</p>

<transactions><bitcoind>
op_return regex search
user15677
# op_return regex search

(Asked by: username_0 on 2014-05-08)

Is there a webservice around that allows one to search the OP\_RETURN data on the blockchain? More precisely: I'm looking for a service that would return the transaction ids of transactions that contain an OP\_RETURN with data that matches the given expression.

**Tags:** transactions, bitcoind


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## 2 answers

### Answer by username_1 on 2014-08-14. Score: 1

[Chain.com](http://chain.com/docs) offers OP\_RETURN data for addresses, transactions and blocks.

> **Comments:**
> **username_2**: While this link may answer the question, it is better to include the essential parts of the answer here and provide the link for reference.  Link-only answers can become invalid if the linked page changes.  
> **username_3**: @username_2: This post seems to be providing a matching though brief answer to the question. I'd say rather the question is at fault than the answer.  

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### Answer by username_4 on 2015-07-16. Score: 0

You can use the [Coin Secrets API](http://api.coinsecrets.org/) to obtain the OP\_RETURN transactions in each block though it does not yet have a regex feature.


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